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Finding the Fourth Proportional to 138,718.92, 191,329.09 and 84,270.86

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Solution

The fourth proportional to 138,718.92, 191,329.09 and 84,270.86 is: 116,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,718.92 : 191,329.09 = 84,270.86 : x
  2. Step 2: Convert to fraction form
    138,718.92/191,329.09 = 84,270.86/x
  3. Step 3: Cross multiply
    138,718.92x = 191,329.09 × 84,270.86
  4. Step 4: Simplify right side
    138,718.92x = 16,123,466,957.32
  5. Step 5: Solve for x
    x = 16,123,466,957.32/138,718.92
  6. Step 6: Final answer
    x = 116,231.20

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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.