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Finding the Fourth Proportional to 128,151.66, 176,849.67 and 71,565.18

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Solution

The fourth proportional to 128,151.66, 176,849.67 and 71,565.18 is: 98,760.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,151.66 : 176,849.67 = 71,565.18 : x
  2. Step 2: Convert to fraction form
    128,151.66/176,849.67 = 71,565.18/x
  3. Step 3: Cross multiply
    128,151.66x = 176,849.67 × 71,565.18
  4. Step 4: Simplify right side
    128,151.66x = 12,656,278,466.49
  5. Step 5: Solve for x
    x = 12,656,278,466.49/128,151.66
  6. Step 6: Final answer
    x = 98,760.16

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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.