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Finding the Fourth Proportional to 66,517.40, 91,827.88 and 51,376.07

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Solution

The fourth proportional to 66,517.40, 91,827.88 and 51,376.07 is: 70,925.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,517.40 : 91,827.88 = 51,376.07 : x
  2. Step 2: Convert to fraction form
    66,517.40/91,827.88 = 51,376.07/x
  3. Step 3: Cross multiply
    66,517.40x = 91,827.88 × 51,376.07
  4. Step 4: Simplify right side
    66,517.40x = 4,717,755,691.96
  5. Step 5: Solve for x
    x = 4,717,755,691.96/66,517.40
  6. Step 6: Final answer
    x = 70,925.13

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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.