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Finding the Fourth Proportional to 158,478.76, 218,700.66 and 86,861.08

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Solution

The fourth proportional to 158,478.76, 218,700.66 and 86,861.08 is: 119,868.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,478.76 : 218,700.66 = 86,861.08 : x
  2. Step 2: Convert to fraction form
    158,478.76/218,700.66 = 86,861.08/x
  3. Step 3: Cross multiply
    158,478.76x = 218,700.66 × 86,861.08
  4. Step 4: Simplify right side
    158,478.76x = 18,996,575,524.31
  5. Step 5: Solve for x
    x = 18,996,575,524.31/158,478.76
  6. Step 6: Final answer
    x = 119,868.27

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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.