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Finding the Fourth Proportional to 84,280.32, 126,144 and 75,064.32

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Solution

The fourth proportional to 84,280.32, 126,144 and 75,064.32 is: 112,350.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,280.32 : 126,144 = 75,064.32 : x
  2. Step 2: Convert to fraction form
    84,280.32/126,144 = 75,064.32/x
  3. Step 3: Cross multiply
    84,280.32x = 126,144 × 75,064.32
  4. Step 4: Simplify right side
    84,280.32x = 9,468,913,582.08
  5. Step 5: Solve for x
    x = 9,468,913,582.08/84,280.32
  6. Step 6: Final answer
    x = 112,350.23

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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.