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Finding the Fourth Proportional to 158,340.38, 218,509.80 and 86,724.91

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Solution

The fourth proportional to 158,340.38, 218,509.80 and 86,724.91 is: 119,680.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,340.38 : 218,509.80 = 86,724.91 : x
  2. Step 2: Convert to fraction form
    158,340.38/218,509.80 = 86,724.91/x
  3. Step 3: Cross multiply
    158,340.38x = 218,509.80 × 86,724.91
  4. Step 4: Simplify right side
    158,340.38x = 18,950,241,646.57
  5. Step 5: Solve for x
    x = 18,950,241,646.57/158,340.38
  6. Step 6: Final answer
    x = 119,680.41

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1.5x scale

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.