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Finding the Fourth Proportional to 158,348.96, 218,521.56 and 86,728.88

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Solution

The fourth proportional to 158,348.96, 218,521.56 and 86,728.88 is: 119,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,348.96 : 218,521.56 = 86,728.88 : x
  2. Step 2: Convert to fraction form
    158,348.96/218,521.56 = 86,728.88/x
  3. Step 3: Cross multiply
    158,348.96x = 218,521.56 × 86,728.88
  4. Step 4: Simplify right side
    158,348.96x = 18,952,130,154.65
  5. Step 5: Solve for x
    x = 18,952,130,154.65/158,348.96
  6. Step 6: Final answer
    x = 119,685.85

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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.