Home / 131,118.74-180,769.64-85,718.66

Finding the Fourth Proportional to 131,118.74, 180,769.64 and 85,718.66

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Solution

The fourth proportional to 131,118.74, 180,769.64 and 85,718.66 is: 118,177.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,118.74 : 180,769.64 = 85,718.66 : x
  2. Step 2: Convert to fraction form
    131,118.74/180,769.64 = 85,718.66/x
  3. Step 3: Cross multiply
    131,118.74x = 180,769.64 × 85,718.66
  4. Step 4: Simplify right side
    131,118.74x = 15,495,331,309.48
  5. Step 5: Solve for x
    x = 15,495,331,309.48/131,118.74
  6. Step 6: Final answer
    x = 118,177.85

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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.