Home / 138,532.08-191,164.68-78,104.88

Finding the Fourth Proportional to 138,532.08, 191,164.68 and 78,104.88

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Solution

The fourth proportional to 138,532.08, 191,164.68 and 78,104.88 is: 107,779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,532.08 : 191,164.68 = 78,104.88 : x
  2. Step 2: Convert to fraction form
    138,532.08/191,164.68 = 78,104.88/x
  3. Step 3: Cross multiply
    138,532.08x = 191,164.68 × 78,104.88
  4. Step 4: Simplify right side
    138,532.08x = 14,930,894,391.64
  5. Step 5: Solve for x
    x = 14,930,894,391.64/138,532.08
  6. Step 6: Final answer
    x = 107,779.33

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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.