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Finding the Fourth Proportional to 128,614.17, 177,488.79 and 71,254.71

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Solution

The fourth proportional to 128,614.17, 177,488.79 and 71,254.71 is: 98,332.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,614.17 : 177,488.79 = 71,254.71 : x
  2. Step 2: Convert to fraction form
    128,614.17/177,488.79 = 71,254.71/x
  3. Step 3: Cross multiply
    128,614.17x = 177,488.79 × 71,254.71
  4. Step 4: Simplify right side
    128,614.17x = 12,646,911,372.26
  5. Step 5: Solve for x
    x = 12,646,911,372.26/128,614.17
  6. Step 6: Final answer
    x = 98,332.18

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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.