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Finding the Fourth Proportional to 66,340.80, 99,511.20 and 45,345.60

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Solution

The fourth proportional to 66,340.80, 99,511.20 and 45,345.60 is: 68,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,340.80 : 99,511.20 = 45,345.60 : x
  2. Step 2: Convert to fraction form
    66,340.80/99,511.20 = 45,345.60/x
  3. Step 3: Cross multiply
    66,340.80x = 99,511.20 × 45,345.60
  4. Step 4: Simplify right side
    66,340.80x = 4,512,395,070.72
  5. Step 5: Solve for x
    x = 4,512,395,070.72/66,340.80
  6. Step 6: Final answer
    x = 68,018.40

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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.