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Finding the Fourth Proportional to 60,664,212.80, 90,996,319.20 and 40,256,878.40

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Solution

The fourth proportional to 60,664,212.80, 90,996,319.20 and 40,256,878.40 is: 60,385,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,664,212.80 : 90,996,319.20 = 40,256,878.40 : x
  2. Step 2: Convert to fraction form
    60,664,212.80/90,996,319.20 = 40,256,878.40/x
  3. Step 3: Cross multiply
    60,664,212.80x = 90,996,319.20 × 40,256,878.40
  4. Step 4: Simplify right side
    60,664,212.80x = 3,663,227,756,881,985.50
  5. Step 5: Solve for x
    x = 3,663,227,756,881,985.50/60,664,212.80
  6. Step 6: Final answer
    x = 60,385,317.60

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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.