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Finding the Fourth Proportional to 100,218.95, 138,304.13 and 54,896.93

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Solution

The fourth proportional to 100,218.95, 138,304.13 and 54,896.93 is: 75,758.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,218.95 : 138,304.13 = 54,896.93 : x
  2. Step 2: Convert to fraction form
    100,218.95/138,304.13 = 54,896.93/x
  3. Step 3: Cross multiply
    100,218.95x = 138,304.13 × 54,896.93
  4. Step 4: Simplify right side
    100,218.95x = 7,592,472,143.32
  5. Step 5: Solve for x
    x = 7,592,472,143.32/100,218.95
  6. Step 6: Final answer
    x = 75,758.85

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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.