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Finding the Fourth Proportional to 120,951.70, 181,427.55 and 87,514.90

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Solution

The fourth proportional to 120,951.70, 181,427.55 and 87,514.90 is: 131,272.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,951.70 : 181,427.55 = 87,514.90 : x
  2. Step 2: Convert to fraction form
    120,951.70/181,427.55 = 87,514.90/x
  3. Step 3: Cross multiply
    120,951.70x = 181,427.55 × 87,514.90
  4. Step 4: Simplify right side
    120,951.70x = 15,877,613,895.50
  5. Step 5: Solve for x
    x = 15,877,613,895.50/120,951.70
  6. Step 6: Final answer
    x = 131,272.35

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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.