Home / 99,640.33-137,499.12-54,318.40

Finding the Fourth Proportional to 99,640.33, 137,499.12 and 54,318.40

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Solution

The fourth proportional to 99,640.33, 137,499.12 and 54,318.40 is: 74,956.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640.33 : 137,499.12 = 54,318.40 : x
  2. Step 2: Convert to fraction form
    99,640.33/137,499.12 = 54,318.40/x
  3. Step 3: Cross multiply
    99,640.33x = 137,499.12 × 54,318.40
  4. Step 4: Simplify right side
    99,640.33x = 7,468,731,856.06
  5. Step 5: Solve for x
    x = 7,468,731,856.06/99,640.33
  6. Step 6: Final answer
    x = 74,956.92

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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.