Home / 138,575.56-191,220.87-78,155.65

Finding the Fourth Proportional to 138,575.56, 191,220.87 and 78,155.65

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Solution

The fourth proportional to 138,575.56, 191,220.87 and 78,155.65 is: 107,847.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,575.56 : 191,220.87 = 78,155.65 : x
  2. Step 2: Convert to fraction form
    138,575.56/191,220.87 = 78,155.65/x
  3. Step 3: Cross multiply
    138,575.56x = 191,220.87 × 78,155.65
  4. Step 4: Simplify right side
    138,575.56x = 14,944,991,388.42
  5. Step 5: Solve for x
    x = 14,944,991,388.42/138,575.56
  6. Step 6: Final answer
    x = 107,847.24

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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.