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Finding the Fourth Proportional to 159,101.72, 219,561.19 and 87,486.38

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Solution

The fourth proportional to 159,101.72, 219,561.19 and 87,486.38 is: 120,731.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,101.72 : 219,561.19 = 87,486.38 : x
  2. Step 2: Convert to fraction form
    159,101.72/219,561.19 = 87,486.38/x
  3. Step 3: Cross multiply
    159,101.72x = 219,561.19 × 87,486.38
  4. Step 4: Simplify right side
    159,101.72x = 19,208,612,385.07
  5. Step 5: Solve for x
    x = 19,208,612,385.07/159,101.72
  6. Step 6: Final answer
    x = 120,731.65

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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.