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Finding the Fourth Proportional to 157,119.30, 216,808.65 and 89,139.78

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Solution

The fourth proportional to 157,119.30, 216,808.65 and 89,139.78 is: 123,003.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,119.30 : 216,808.65 = 89,139.78 : x
  2. Step 2: Convert to fraction form
    157,119.30/216,808.65 = 89,139.78/x
  3. Step 3: Cross multiply
    157,119.30x = 216,808.65 × 89,139.78
  4. Step 4: Simplify right side
    157,119.30x = 19,326,275,363.10
  5. Step 5: Solve for x
    x = 19,326,275,363.10/157,119.30
  6. Step 6: Final answer
    x = 123,003.83

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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.