Home / 100,381.28-138,527.92-55,058.52

Finding the Fourth Proportional to 100,381.28, 138,527.92 and 55,058.52

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Solution

The fourth proportional to 100,381.28, 138,527.92 and 55,058.52 is: 75,981.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,381.28 : 138,527.92 = 55,058.52 : x
  2. Step 2: Convert to fraction form
    100,381.28/138,527.92 = 55,058.52/x
  3. Step 3: Cross multiply
    100,381.28x = 138,527.92 × 55,058.52
  4. Step 4: Simplify right side
    100,381.28x = 7,627,142,253.88
  5. Step 5: Solve for x
    x = 7,627,142,253.88/100,381.28
  6. Step 6: Final answer
    x = 75,981.72

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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.