Home / 135,981.28-187,601.76-100,256.08

Finding the Fourth Proportional to 135,981.28, 187,601.76 and 100,256.08

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Solution

The fourth proportional to 135,981.28, 187,601.76 and 100,256.08 is: 138,314.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,981.28 : 187,601.76 = 100,256.08 : x
  2. Step 2: Convert to fraction form
    135,981.28/187,601.76 = 100,256.08/x
  3. Step 3: Cross multiply
    135,981.28x = 187,601.76 × 100,256.08
  4. Step 4: Simplify right side
    135,981.28x = 18,808,217,058.70
  5. Step 5: Solve for x
    x = 18,808,217,058.70/135,981.28
  6. Step 6: Final answer
    x = 138,314.75

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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.