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Finding the Fourth Proportional to 66,562.74, 91,804.65 and 42,691.23

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Solution

The fourth proportional to 66,562.74, 91,804.65 and 42,691.23 is: 58,880.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,562.74 : 91,804.65 = 42,691.23 : x
  2. Step 2: Convert to fraction form
    66,562.74/91,804.65 = 42,691.23/x
  3. Step 3: Cross multiply
    66,562.74x = 91,804.65 × 42,691.23
  4. Step 4: Simplify right side
    66,562.74x = 3,919,253,428.22
  5. Step 5: Solve for x
    x = 3,919,253,428.22/66,562.74
  6. Step 6: Final answer
    x = 58,880.59

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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.