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Finding the Fourth Proportional to 66,565.80, 91,834.56 and 42,688.62

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Solution

The fourth proportional to 66,565.80, 91,834.56 and 42,688.62 is: 58,893.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,565.80 : 91,834.56 = 42,688.62 : x
  2. Step 2: Convert to fraction form
    66,565.80/91,834.56 = 42,688.62/x
  3. Step 3: Cross multiply
    66,565.80x = 91,834.56 × 42,688.62
  4. Step 4: Simplify right side
    66,565.80x = 3,920,290,634.71
  5. Step 5: Solve for x
    x = 3,920,290,634.71/66,565.80
  6. Step 6: Final answer
    x = 58,893.47

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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.