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Finding the Fourth Proportional to 159,590.64, 220,244.40 and 87,985.92

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Solution

The fourth proportional to 159,590.64, 220,244.40 and 87,985.92 is: 121,425.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,590.64 : 220,244.40 = 87,985.92 : x
  2. Step 2: Convert to fraction form
    159,590.64/220,244.40 = 87,985.92/x
  3. Step 3: Cross multiply
    159,590.64x = 220,244.40 × 87,985.92
  4. Step 4: Simplify right side
    159,590.64x = 19,378,406,158.85
  5. Step 5: Solve for x
    x = 19,378,406,158.85/159,590.64
  6. Step 6: Final answer
    x = 121,425.71

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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.