Home / 130,620.64-180,358.20-100,357.96

Finding the Fourth Proportional to 130,620.64, 180,358.20 and 100,357.96

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Solution

The fourth proportional to 130,620.64, 180,358.20 and 100,357.96 is: 138,572.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,620.64 : 180,358.20 = 100,357.96 : x
  2. Step 2: Convert to fraction form
    130,620.64/180,358.20 = 100,357.96/x
  3. Step 3: Cross multiply
    130,620.64x = 180,358.20 × 100,357.96
  4. Step 4: Simplify right side
    130,620.64x = 18,100,381,021.27
  5. Step 5: Solve for x
    x = 18,100,381,021.27/130,620.64
  6. Step 6: Final answer
    x = 138,572.14

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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.