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Finding the Fourth Proportional to 128,081.06, 176,746.17 and 71,491.14

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Solution

The fourth proportional to 128,081.06, 176,746.17 and 71,491.14 is: 98,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,081.06 : 176,746.17 = 71,491.14 : x
  2. Step 2: Convert to fraction form
    128,081.06/176,746.17 = 71,491.14/x
  3. Step 3: Cross multiply
    128,081.06x = 176,746.17 × 71,491.14
  4. Step 4: Simplify right side
    128,081.06x = 12,635,785,183.93
  5. Step 5: Solve for x
    x = 12,635,785,183.93/128,081.06
  6. Step 6: Final answer
    x = 98,654.60

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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.