Home / 120,781.72-181,077.30-76,314.76

Finding the Fourth Proportional to 120,781.72, 181,077.30 and 76,314.76

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Solution

The fourth proportional to 120,781.72, 181,077.30 and 76,314.76 is: 114,411.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,781.72 : 181,077.30 = 76,314.76 : x
  2. Step 2: Convert to fraction form
    120,781.72/181,077.30 = 76,314.76/x
  3. Step 3: Cross multiply
    120,781.72x = 181,077.30 × 76,314.76
  4. Step 4: Simplify right side
    120,781.72x = 13,818,870,690.95
  5. Step 5: Solve for x
    x = 13,818,870,690.95/120,781.72
  6. Step 6: Final answer
    x = 114,411.94

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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.