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Finding the Fourth Proportional to 158,602, 218,890.20 and 91,534

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Solution

The fourth proportional to 158,602, 218,890.20 and 91,534 is: 126,328.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,602 : 218,890.20 = 91,534 : x
  2. Step 2: Convert to fraction form
    158,602/218,890.20 = 91,534/x
  3. Step 3: Cross multiply
    158,602x = 218,890.20 × 91,534
  4. Step 4: Simplify right side
    158,602x = 20,035,895,566.80
  5. Step 5: Solve for x
    x = 20,035,895,566.80/158,602
  6. Step 6: Final answer
    x = 126,328.14

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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.