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Finding the Fourth Proportional to 66,083.60, 91,167.72 and 40,915.28

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Solution

The fourth proportional to 66,083.60, 91,167.72 and 40,915.28 is: 56,445.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,083.60 : 91,167.72 = 40,915.28 : x
  2. Step 2: Convert to fraction form
    66,083.60/91,167.72 = 40,915.28/x
  3. Step 3: Cross multiply
    66,083.60x = 91,167.72 × 40,915.28
  4. Step 4: Simplify right side
    66,083.60x = 3,730,152,790.76
  5. Step 5: Solve for x
    x = 3,730,152,790.76/66,083.60
  6. Step 6: Final answer
    x = 56,445.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.