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Finding the Fourth Proportional to 100,073, 138,101.28 and 54,751.52

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Solution

The fourth proportional to 100,073, 138,101.28 and 54,751.52 is: 75,557.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,073 : 138,101.28 = 54,751.52 : x
  2. Step 2: Convert to fraction form
    100,073/138,101.28 = 54,751.52/x
  3. Step 3: Cross multiply
    100,073x = 138,101.28 × 54,751.52
  4. Step 4: Simplify right side
    100,073x = 7,561,254,993.95
  5. Step 5: Solve for x
    x = 7,561,254,993.95/100,073
  6. Step 6: Final answer
    x = 75,557.39

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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.