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Finding the Fourth Proportional to 66,468.60, 99,557.10 and 57,720.60

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Solution

The fourth proportional to 66,468.60, 99,557.10 and 57,720.60 is: 86,454.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,468.60 : 99,557.10 = 57,720.60 : x
  2. Step 2: Convert to fraction form
    66,468.60/99,557.10 = 57,720.60/x
  3. Step 3: Cross multiply
    66,468.60x = 99,557.10 × 57,720.60
  4. Step 4: Simplify right side
    66,468.60x = 5,746,495,546.26
  5. Step 5: Solve for x
    x = 5,746,495,546.26/66,468.60
  6. Step 6: Final answer
    x = 86,454.29

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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.