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Finding the Fourth Proportional to 158,663.45, 218,961.27 and 87,045.59

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Solution

The fourth proportional to 158,663.45, 218,961.27 and 87,045.59 is: 120,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,663.45 : 218,961.27 = 87,045.59 : x
  2. Step 2: Convert to fraction form
    158,663.45/218,961.27 = 87,045.59/x
  3. Step 3: Cross multiply
    158,663.45x = 218,961.27 × 87,045.59
  4. Step 4: Simplify right side
    158,663.45x = 19,059,613,481.70
  5. Step 5: Solve for x
    x = 19,059,613,481.70/158,663.45
  6. Step 6: Final answer
    x = 120,126.05

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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.