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Finding the Fourth Proportional to 159,585.61, 220,238 and 87,965.47

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Solution

The fourth proportional to 159,585.61, 220,238 and 87,965.47 is: 121,397.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,585.61 : 220,238 = 87,965.47 : x
  2. Step 2: Convert to fraction form
    159,585.61/220,238 = 87,965.47/x
  3. Step 3: Cross multiply
    159,585.61x = 220,238 × 87,965.47
  4. Step 4: Simplify right side
    159,585.61x = 19,373,339,181.86
  5. Step 5: Solve for x
    x = 19,373,339,181.86/159,585.61
  6. Step 6: Final answer
    x = 121,397.78

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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.