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Finding the Fourth Proportional to 66,461.52, 91,711.08 and 38,165.52

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Solution

The fourth proportional to 66,461.52, 91,711.08 and 38,165.52 is: 52,665.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.52 : 91,711.08 = 38,165.52 : x
  2. Step 2: Convert to fraction form
    66,461.52/91,711.08 = 38,165.52/x
  3. Step 3: Cross multiply
    66,461.52x = 91,711.08 × 38,165.52
  4. Step 4: Simplify right side
    66,461.52x = 3,500,201,057.96
  5. Step 5: Solve for x
    x = 3,500,201,057.96/66,461.52
  6. Step 6: Final answer
    x = 52,665.08

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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.