Home / 138,942.16-191,740.34-75,279.92

Finding the Fourth Proportional to 138,942.16, 191,740.34 and 75,279.92

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Solution

The fourth proportional to 138,942.16, 191,740.34 and 75,279.92 is: 103,886.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,942.16 : 191,740.34 = 75,279.92 : x
  2. Step 2: Convert to fraction form
    138,942.16/191,740.34 = 75,279.92/x
  3. Step 3: Cross multiply
    138,942.16x = 191,740.34 × 75,279.92
  4. Step 4: Simplify right side
    138,942.16x = 14,434,196,685.47
  5. Step 5: Solve for x
    x = 14,434,196,685.47/138,942.16
  6. Step 6: Final answer
    x = 103,886.37

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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.