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Finding the Fourth Proportional to 100,842.48, 139,160.16 and 58,398.48

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Solution

The fourth proportional to 100,842.48, 139,160.16 and 58,398.48 is: 80,588.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,842.48 : 139,160.16 = 58,398.48 : x
  2. Step 2: Convert to fraction form
    100,842.48/139,160.16 = 58,398.48/x
  3. Step 3: Cross multiply
    100,842.48x = 139,160.16 × 58,398.48
  4. Step 4: Simplify right side
    100,842.48x = 8,126,741,820.56
  5. Step 5: Solve for x
    x = 8,126,741,820.56/100,842.48
  6. Step 6: Final answer
    x = 80,588.48

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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.