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Finding the Fourth Proportional to 115,920.70, 173,881.05 and 87,927.10

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Solution

The fourth proportional to 115,920.70, 173,881.05 and 87,927.10 is: 131,890.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.70 : 173,881.05 = 87,927.10 : x
  2. Step 2: Convert to fraction form
    115,920.70/173,881.05 = 87,927.10/x
  3. Step 3: Cross multiply
    115,920.70x = 173,881.05 × 87,927.10
  4. Step 4: Simplify right side
    115,920.70x = 15,288,856,471.46
  5. Step 5: Solve for x
    x = 15,288,856,471.46/115,920.70
  6. Step 6: Final answer
    x = 131,890.65

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Similar ratio
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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.