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Finding the Fourth Proportional to 155,790.69, 215,019.17 and 148,691.17

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Solution

The fourth proportional to 155,790.69, 215,019.17 and 148,691.17 is: 205,220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,790.69 : 215,019.17 = 148,691.17 : x
  2. Step 2: Convert to fraction form
    155,790.69/215,019.17 = 148,691.17/x
  3. Step 3: Cross multiply
    155,790.69x = 215,019.17 × 148,691.17
  4. Step 4: Simplify right side
    155,790.69x = 31,971,451,959.73
  5. Step 5: Solve for x
    x = 31,971,451,959.73/155,790.69
  6. Step 6: Final answer
    x = 205,220.56

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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.