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Finding the Fourth Proportional to 72,153.84, 107,702.38 and 63,631.89

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Solution

The fourth proportional to 72,153.84, 107,702.38 and 63,631.89 is: 94,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,153.84 : 107,702.38 = 63,631.89 : x
  2. Step 2: Convert to fraction form
    72,153.84/107,702.38 = 63,631.89/x
  3. Step 3: Cross multiply
    72,153.84x = 107,702.38 × 63,631.89
  4. Step 4: Simplify right side
    72,153.84x = 6,853,305,996.90
  5. Step 5: Solve for x
    x = 6,853,305,996.90/72,153.84
  6. Step 6: Final answer
    x = 94,981.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.