Home / 130,812.72-180,177.76-100,540.16

Finding the Fourth Proportional to 130,812.72, 180,177.76 and 100,540.16

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Solution

The fourth proportional to 130,812.72, 180,177.76 and 100,540.16 is: 138,481.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,812.72 : 180,177.76 = 100,540.16 : x
  2. Step 2: Convert to fraction form
    130,812.72/180,177.76 = 100,540.16/x
  3. Step 3: Cross multiply
    130,812.72x = 180,177.76 × 100,540.16
  4. Step 4: Simplify right side
    130,812.72x = 18,115,100,818.84
  5. Step 5: Solve for x
    x = 18,115,100,818.84/130,812.72
  6. Step 6: Final answer
    x = 138,481.19

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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.