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Finding the Fourth Proportional to 128,239, 176,966.52 and 71,650.84

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Solution

The fourth proportional to 128,239, 176,966.52 and 71,650.84 is: 98,876.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,239 : 176,966.52 = 71,650.84 : x
  2. Step 2: Convert to fraction form
    128,239/176,966.52 = 71,650.84/x
  3. Step 3: Cross multiply
    128,239x = 176,966.52 × 71,650.84
  4. Step 4: Simplify right side
    128,239x = 12,679,799,809.88
  5. Step 5: Solve for x
    x = 12,679,799,809.88/128,239
  6. Step 6: Final answer
    x = 98,876.32

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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.