Home / 100,133.28-138,218.49-57,708.72

Finding the Fourth Proportional to 100,133.28, 138,218.49 and 57,708.72

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Solution

The fourth proportional to 100,133.28, 138,218.49 and 57,708.72 is: 79,657.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,133.28 : 138,218.49 = 57,708.72 : x
  2. Step 2: Convert to fraction form
    100,133.28/138,218.49 = 57,708.72/x
  3. Step 3: Cross multiply
    100,133.28x = 138,218.49 × 57,708.72
  4. Step 4: Simplify right side
    100,133.28x = 7,976,412,138.23
  5. Step 5: Solve for x
    x = 7,976,412,138.23/100,133.28
  6. Step 6: Final answer
    x = 79,657.95

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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.