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Finding the Fourth Proportional to 128,032.08, 176,689.92 and 71,443.68

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Solution

The fourth proportional to 128,032.08, 176,689.92 and 71,443.68 is: 98,595.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,032.08 : 176,689.92 = 71,443.68 : x
  2. Step 2: Convert to fraction form
    128,032.08/176,689.92 = 71,443.68/x
  3. Step 3: Cross multiply
    128,032.08x = 176,689.92 × 71,443.68
  4. Step 4: Simplify right side
    128,032.08x = 12,623,378,103.71
  5. Step 5: Solve for x
    x = 12,623,378,103.71/128,032.08
  6. Step 6: Final answer
    x = 98,595.43

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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.