Home / 138,725.12-191,426.01-80,570.50

Finding the Fourth Proportional to 138,725.12, 191,426.01 and 80,570.50

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Solution

The fourth proportional to 138,725.12, 191,426.01 and 80,570.50 is: 111,178.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,725.12 : 191,426.01 = 80,570.50 : x
  2. Step 2: Convert to fraction form
    138,725.12/191,426.01 = 80,570.50/x
  3. Step 3: Cross multiply
    138,725.12x = 191,426.01 × 80,570.50
  4. Step 4: Simplify right side
    138,725.12x = 15,423,289,338.71
  5. Step 5: Solve for x
    x = 15,423,289,338.71/138,725.12
  6. Step 6: Final answer
    x = 111,178.78

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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.