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Finding the Fourth Proportional to 66,381.47, 91,605.92 and 36,166.70

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Solution

The fourth proportional to 66,381.47, 91,605.92 and 36,166.70 is: 49,909.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,381.47 : 91,605.92 = 36,166.70 : x
  2. Step 2: Convert to fraction form
    66,381.47/91,605.92 = 36,166.70/x
  3. Step 3: Cross multiply
    66,381.47x = 91,605.92 × 36,166.70
  4. Step 4: Simplify right side
    66,381.47x = 3,313,083,368.83
  5. Step 5: Solve for x
    x = 3,313,083,368.83/66,381.47
  6. Step 6: Final answer
    x = 49,909.76

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1.5x scale

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.