Home / 135,712.04-187,278.97-78,349.42

Finding the Fourth Proportional to 135,712.04, 187,278.97 and 78,349.42

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Solution

The fourth proportional to 135,712.04, 187,278.97 and 78,349.42 is: 108,120.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,712.04 : 187,278.97 = 78,349.42 : x
  2. Step 2: Convert to fraction form
    135,712.04/187,278.97 = 78,349.42/x
  3. Step 3: Cross multiply
    135,712.04x = 187,278.97 × 78,349.42
  4. Step 4: Simplify right side
    135,712.04x = 14,673,198,285.95
  5. Step 5: Solve for x
    x = 14,673,198,285.95/135,712.04
  6. Step 6: Final answer
    x = 108,120.10

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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.