Home / 100,470.24-138,659.76-64,204.74

Finding the Fourth Proportional to 100,470.24, 138,659.76 and 64,204.74

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Solution

The fourth proportional to 100,470.24, 138,659.76 and 64,204.74 is: 88,609.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,470.24 : 138,659.76 = 64,204.74 : x
  2. Step 2: Convert to fraction form
    100,470.24/138,659.76 = 64,204.74/x
  3. Step 3: Cross multiply
    100,470.24x = 138,659.76 × 64,204.74
  4. Step 4: Simplify right side
    100,470.24x = 8,902,613,839.26
  5. Step 5: Solve for x
    x = 8,902,613,839.26/100,470.24
  6. Step 6: Final answer
    x = 88,609.46

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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.