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Finding the Fourth Proportional to 158,668.38, 218,960.46 and 87,049.08

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Solution

The fourth proportional to 158,668.38, 218,960.46 and 87,049.08 is: 120,126.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,668.38 : 218,960.46 = 87,049.08 : x
  2. Step 2: Convert to fraction form
    158,668.38/218,960.46 = 87,049.08/x
  3. Step 3: Cross multiply
    158,668.38x = 218,960.46 × 87,049.08
  4. Step 4: Simplify right side
    158,668.38x = 19,060,306,599.38
  5. Step 5: Solve for x
    x = 19,060,306,599.38/158,668.38
  6. Step 6: Final answer
    x = 120,126.69

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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.