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Finding the Fourth Proportional to 158,407.62, 218,602.52 and 86,790.36

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Solution

The fourth proportional to 158,407.62, 218,602.52 and 86,790.36 is: 119,770.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,407.62 : 218,602.52 = 86,790.36 : x
  2. Step 2: Convert to fraction form
    158,407.62/218,602.52 = 86,790.36/x
  3. Step 3: Cross multiply
    158,407.62x = 218,602.52 × 86,790.36
  4. Step 4: Simplify right side
    158,407.62x = 18,972,591,407.71
  5. Step 5: Solve for x
    x = 18,972,591,407.71/158,407.62
  6. Step 6: Final answer
    x = 119,770.70

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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.