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Finding the Fourth Proportional to 66,165.60, 99,102.60 and 57,417.60

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Solution

The fourth proportional to 66,165.60, 99,102.60 and 57,417.60 is: 85,999.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,165.60 : 99,102.60 = 57,417.60 : x
  2. Step 2: Convert to fraction form
    66,165.60/99,102.60 = 57,417.60/x
  3. Step 3: Cross multiply
    66,165.60x = 99,102.60 × 57,417.60
  4. Step 4: Simplify right side
    66,165.60x = 5,690,233,445.76
  5. Step 5: Solve for x
    x = 5,690,233,445.76/66,165.60
  6. Step 6: Final answer
    x = 85,999.88

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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.