Home / 138,621.27-191,293.05-78,191.04

Finding the Fourth Proportional to 138,621.27, 191,293.05 and 78,191.04

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Solution

The fourth proportional to 138,621.27, 191,293.05 and 78,191.04 is: 107,901.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,621.27 : 191,293.05 = 78,191.04 : x
  2. Step 2: Convert to fraction form
    138,621.27/191,293.05 = 78,191.04/x
  3. Step 3: Cross multiply
    138,621.27x = 191,293.05 × 78,191.04
  4. Step 4: Simplify right side
    138,621.27x = 14,957,402,524.27
  5. Step 5: Solve for x
    x = 14,957,402,524.27/138,621.27
  6. Step 6: Final answer
    x = 107,901.21

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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.