Home / 120,508.76-166,378.26-77,508.20

Finding the Fourth Proportional to 120,508.76, 166,378.26 and 77,508.20

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Solution

The fourth proportional to 120,508.76, 166,378.26 and 77,508.20 is: 107,010.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,508.76 : 166,378.26 = 77,508.20 : x
  2. Step 2: Convert to fraction form
    120,508.76/166,378.26 = 77,508.20/x
  3. Step 3: Cross multiply
    120,508.76x = 166,378.26 × 77,508.20
  4. Step 4: Simplify right side
    120,508.76x = 12,895,679,451.73
  5. Step 5: Solve for x
    x = 12,895,679,451.73/120,508.76
  6. Step 6: Final answer
    x = 107,010.31

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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.