Home / 130,493.20-180,077.56-76,781.70

Finding the Fourth Proportional to 130,493.20, 180,077.56 and 76,781.70

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Solution

The fourth proportional to 130,493.20, 180,077.56 and 76,781.70 is: 105,956.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,493.20 : 180,077.56 = 76,781.70 : x
  2. Step 2: Convert to fraction form
    130,493.20/180,077.56 = 76,781.70/x
  3. Step 3: Cross multiply
    130,493.20x = 180,077.56 × 76,781.70
  4. Step 4: Simplify right side
    130,493.20x = 13,826,660,659.05
  5. Step 5: Solve for x
    x = 13,826,660,659.05/130,493.20
  6. Step 6: Final answer
    x = 105,956.94

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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.