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Finding the Fourth Proportional to 128,234.75, 176,964.03 and 71,646.13

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Solution

The fourth proportional to 128,234.75, 176,964.03 and 71,646.13 is: 98,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,234.75 : 176,964.03 = 71,646.13 : x
  2. Step 2: Convert to fraction form
    128,234.75/176,964.03 = 71,646.13/x
  3. Step 3: Cross multiply
    128,234.75x = 176,964.03 × 71,646.13
  4. Step 4: Simplify right side
    128,234.75x = 12,678,787,898.70
  5. Step 5: Solve for x
    x = 12,678,787,898.70/128,234.75
  6. Step 6: Final answer
    x = 98,871.70

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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.