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Finding the Fourth Proportional to 100,388.84, 138,532.20 and 60,125

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Solution

The fourth proportional to 100,388.84, 138,532.20 and 60,125 is: 82,969.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,388.84 : 138,532.20 = 60,125 : x
  2. Step 2: Convert to fraction form
    100,388.84/138,532.20 = 60,125/x
  3. Step 3: Cross multiply
    100,388.84x = 138,532.20 × 60,125
  4. Step 4: Simplify right side
    100,388.84x = 8,329,248,525.00
  5. Step 5: Solve for x
    x = 8,329,248,525.00/100,388.84
  6. Step 6: Final answer
    x = 82,969.87

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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.