Home / 138,855.48-191,609.73-78,432.18

Finding the Fourth Proportional to 138,855.48, 191,609.73 and 78,432.18

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Solution

The fourth proportional to 138,855.48, 191,609.73 and 78,432.18 is: 108,230.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,855.48 : 191,609.73 = 78,432.18 : x
  2. Step 2: Convert to fraction form
    138,855.48/191,609.73 = 78,432.18/x
  3. Step 3: Cross multiply
    138,855.48x = 191,609.73 × 78,432.18
  4. Step 4: Simplify right side
    138,855.48x = 15,028,368,833.11
  5. Step 5: Solve for x
    x = 15,028,368,833.11/138,855.48
  6. Step 6: Final answer
    x = 108,230.29

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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.