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Finding the Fourth Proportional to 239,990.80, 359,984.52 and 80,079.28

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Solution

The fourth proportional to 239,990.80, 359,984.52 and 80,079.28 is: 120,118.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,990.80 : 359,984.52 = 80,079.28 : x
  2. Step 2: Convert to fraction form
    239,990.80/359,984.52 = 80,079.28/x
  3. Step 3: Cross multiply
    239,990.80x = 359,984.52 × 80,079.28
  4. Step 4: Simplify right side
    239,990.80x = 28,827,301,172.75
  5. Step 5: Solve for x
    x = 28,827,301,172.75/239,990.80
  6. Step 6: Final answer
    x = 120,118.36

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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.