Home / 135,542.16-187,036.56-78,161.76

Finding the Fourth Proportional to 135,542.16, 187,036.56 and 78,161.76

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Solution

The fourth proportional to 135,542.16, 187,036.56 and 78,161.76 is: 107,856.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,542.16 : 187,036.56 = 78,161.76 : x
  2. Step 2: Convert to fraction form
    135,542.16/187,036.56 = 78,161.76/x
  3. Step 3: Cross multiply
    135,542.16x = 187,036.56 × 78,161.76
  4. Step 4: Simplify right side
    135,542.16x = 14,619,106,713.95
  5. Step 5: Solve for x
    x = 14,619,106,713.95/135,542.16
  6. Step 6: Final answer
    x = 107,856.53

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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.