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Finding the Fourth Proportional to 100,793.28, 139,054.56 and 60,509.28

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Solution

The fourth proportional to 100,793.28, 139,054.56 and 60,509.28 is: 83,478.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,793.28 : 139,054.56 = 60,509.28 : x
  2. Step 2: Convert to fraction form
    100,793.28/139,054.56 = 60,509.28/x
  3. Step 3: Cross multiply
    100,793.28x = 139,054.56 × 60,509.28
  4. Step 4: Simplify right side
    100,793.28x = 8,414,091,306.32
  5. Step 5: Solve for x
    x = 8,414,091,306.32/100,793.28
  6. Step 6: Final answer
    x = 83,478.69

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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.