Home / 131,118.71-180,769.61-85,718.64

Finding the Fourth Proportional to 131,118.71, 180,769.61 and 85,718.64

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Solution

The fourth proportional to 131,118.71, 180,769.61 and 85,718.64 is: 118,177.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,118.71 : 180,769.61 = 85,718.64 : x
  2. Step 2: Convert to fraction form
    131,118.71/180,769.61 = 85,718.64/x
  3. Step 3: Cross multiply
    131,118.71x = 180,769.61 × 85,718.64
  4. Step 4: Simplify right side
    131,118.71x = 15,495,325,122.53
  5. Step 5: Solve for x
    x = 15,495,325,122.53/131,118.71
  6. Step 6: Final answer
    x = 118,177.83

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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.