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Finding the Fourth Proportional to 99,630.75, 137,490.31 and 54,308.82

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Solution

The fourth proportional to 99,630.75, 137,490.31 and 54,308.82 is: 74,946.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,630.75 : 137,490.31 = 54,308.82 : x
  2. Step 2: Convert to fraction form
    99,630.75/137,490.31 = 54,308.82/x
  3. Step 3: Cross multiply
    99,630.75x = 137,490.31 × 54,308.82
  4. Step 4: Simplify right side
    99,630.75x = 7,466,936,497.53
  5. Step 5: Solve for x
    x = 7,466,936,497.53/99,630.75
  6. Step 6: Final answer
    x = 74,946.10

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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.