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Finding the Fourth Proportional to 99,641.67, 137,502.75 and 54,320.55

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Solution

The fourth proportional to 99,641.67, 137,502.75 and 54,320.55 is: 74,960.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,641.67 : 137,502.75 = 54,320.55 : x
  2. Step 2: Convert to fraction form
    99,641.67/137,502.75 = 54,320.55/x
  3. Step 3: Cross multiply
    99,641.67x = 137,502.75 × 54,320.55
  4. Step 4: Simplify right side
    99,641.67x = 7,469,225,006.51
  5. Step 5: Solve for x
    x = 7,469,225,006.51/99,641.67
  6. Step 6: Final answer
    x = 74,960.86

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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.