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Finding the Fourth Proportional to 65,663,800.80, 98,495,701.20 and 20,219,690.40

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Solution

The fourth proportional to 65,663,800.80, 98,495,701.20 and 20,219,690.40 is: 30,329,535.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,663,800.80 : 98,495,701.20 = 20,219,690.40 : x
  2. Step 2: Convert to fraction form
    65,663,800.80/98,495,701.20 = 20,219,690.40/x
  3. Step 3: Cross multiply
    65,663,800.80x = 98,495,701.20 × 20,219,690.40
  4. Step 4: Simplify right side
    65,663,800.80x = 1,991,552,583,994,908.50
  5. Step 5: Solve for x
    x = 1,991,552,583,994,908.50/65,663,800.80
  6. Step 6: Final answer
    x = 30,329,535.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.