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Finding the Fourth Proportional to 115,380, 159,241.68 and 70,693.92

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Solution

The fourth proportional to 115,380, 159,241.68 and 70,693.92 is: 97,568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,380 : 159,241.68 = 70,693.92 : x
  2. Step 2: Convert to fraction form
    115,380/159,241.68 = 70,693.92/x
  3. Step 3: Cross multiply
    115,380x = 159,241.68 × 70,693.92
  4. Step 4: Simplify right side
    115,380x = 11,257,418,586.59
  5. Step 5: Solve for x
    x = 11,257,418,586.59/115,380
  6. Step 6: Final answer
    x = 97,568.20

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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.