Home / 120,764.60-181,341.30-91,215.80

Finding the Fourth Proportional to 120,764.60, 181,341.30 and 91,215.80

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Solution

The fourth proportional to 120,764.60, 181,341.30 and 91,215.80 is: 136,970.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,764.60 : 181,341.30 = 91,215.80 : x
  2. Step 2: Convert to fraction form
    120,764.60/181,341.30 = 91,215.80/x
  3. Step 3: Cross multiply
    120,764.60x = 181,341.30 × 91,215.80
  4. Step 4: Simplify right side
    120,764.60x = 16,541,191,752.54
  5. Step 5: Solve for x
    x = 16,541,191,752.54/120,764.60
  6. Step 6: Final answer
    x = 136,970.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.