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Finding the Fourth Proportional to 158,356.47, 218,531.99 and 86,737.69

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Solution

The fourth proportional to 158,356.47, 218,531.99 and 86,737.69 is: 119,698.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,356.47 : 218,531.99 = 86,737.69 : x
  2. Step 2: Convert to fraction form
    158,356.47/218,531.99 = 86,737.69/x
  3. Step 3: Cross multiply
    158,356.47x = 218,531.99 × 86,737.69
  4. Step 4: Simplify right side
    158,356.47x = 18,954,960,003.70
  5. Step 5: Solve for x
    x = 18,954,960,003.70/158,356.47
  6. Step 6: Final answer
    x = 119,698.05

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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.