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Finding the Fourth Proportional to 124,115.76, 186,267.20 and 90,920.75

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Solution

The fourth proportional to 124,115.76, 186,267.20 and 90,920.75 is: 136,449.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,115.76 : 186,267.20 = 90,920.75 : x
  2. Step 2: Convert to fraction form
    124,115.76/186,267.20 = 90,920.75/x
  3. Step 3: Cross multiply
    124,115.76x = 186,267.20 × 90,920.75
  4. Step 4: Simplify right side
    124,115.76x = 16,935,552,138.46
  5. Step 5: Solve for x
    x = 16,935,552,138.46/124,115.76
  6. Step 6: Final answer
    x = 136,449.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.