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Finding the Fourth Proportional to 100,304.88, 138,424.28 and 54,982.85

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Solution

The fourth proportional to 100,304.88, 138,424.28 and 54,982.85 is: 75,878.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,304.88 : 138,424.28 = 54,982.85 : x
  2. Step 2: Convert to fraction form
    100,304.88/138,424.28 = 54,982.85/x
  3. Step 3: Cross multiply
    100,304.88x = 138,424.28 × 54,982.85
  4. Step 4: Simplify right side
    100,304.88x = 7,610,961,423.60
  5. Step 5: Solve for x
    x = 7,610,961,423.60/100,304.88
  6. Step 6: Final answer
    x = 75,878.28

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1.5x scale

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.