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Finding the Fourth Proportional to 66,541.38, 91,818.39 and 39,687.04

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Solution

The fourth proportional to 66,541.38, 91,818.39 and 39,687.04 is: 54,762.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,541.38 : 91,818.39 = 39,687.04 : x
  2. Step 2: Convert to fraction form
    66,541.38/91,818.39 = 39,687.04/x
  3. Step 3: Cross multiply
    66,541.38x = 91,818.39 × 39,687.04
  4. Step 4: Simplify right side
    66,541.38x = 3,644,000,116.67
  5. Step 5: Solve for x
    x = 3,644,000,116.67/66,541.38
  6. Step 6: Final answer
    x = 54,762.92

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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.