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Finding the Fourth Proportional to 158,356.98, 218,535.78 and 86,737.02

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Solution

The fourth proportional to 158,356.98, 218,535.78 and 86,737.02 is: 119,698.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,356.98 : 218,535.78 = 86,737.02 : x
  2. Step 2: Convert to fraction form
    158,356.98/218,535.78 = 86,737.02/x
  3. Step 3: Cross multiply
    158,356.98x = 218,535.78 × 86,737.02
  4. Step 4: Simplify right side
    158,356.98x = 18,955,142,320.58
  5. Step 5: Solve for x
    x = 18,955,142,320.58/158,356.98
  6. Step 6: Final answer
    x = 119,698.81

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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.