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Finding the Fourth Proportional to 66,564.68, 91,859.12 and 42,691.29

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Solution

The fourth proportional to 66,564.68, 91,859.12 and 42,691.29 is: 58,913.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,564.68 : 91,859.12 = 42,691.29 : x
  2. Step 2: Convert to fraction form
    66,564.68/91,859.12 = 42,691.29/x
  3. Step 3: Cross multiply
    66,564.68x = 91,859.12 × 42,691.29
  4. Step 4: Simplify right side
    66,564.68x = 3,921,583,933.23
  5. Step 5: Solve for x
    x = 3,921,583,933.23/66,564.68
  6. Step 6: Final answer
    x = 58,913.89

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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.