Home / 100,836.20-151,254.30-77,216.60

Finding the Fourth Proportional to 100,836.20, 151,254.30 and 77,216.60

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Solution

The fourth proportional to 100,836.20, 151,254.30 and 77,216.60 is: 115,824.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,836.20 : 151,254.30 = 77,216.60 : x
  2. Step 2: Convert to fraction form
    100,836.20/151,254.30 = 77,216.60/x
  3. Step 3: Cross multiply
    100,836.20x = 151,254.30 × 77,216.60
  4. Step 4: Simplify right side
    100,836.20x = 11,679,342,781.38
  5. Step 5: Solve for x
    x = 11,679,342,781.38/100,836.20
  6. Step 6: Final answer
    x = 115,824.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.