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Finding the Fourth Proportional to 119,728.80, 179,614.80 and 60,415.20

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Solution

The fourth proportional to 119,728.80, 179,614.80 and 60,415.20 is: 90,633.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,728.80 : 179,614.80 = 60,415.20 : x
  2. Step 2: Convert to fraction form
    119,728.80/179,614.80 = 60,415.20/x
  3. Step 3: Cross multiply
    119,728.80x = 179,614.80 × 60,415.20
  4. Step 4: Simplify right side
    119,728.80x = 10,851,464,064.96
  5. Step 5: Solve for x
    x = 10,851,464,064.96/119,728.80
  6. Step 6: Final answer
    x = 90,633.70

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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.