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Finding the Fourth Proportional to 115,248.49, 158,983.63 and 76,995.81

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Solution

The fourth proportional to 115,248.49, 158,983.63 and 76,995.81 is: 106,214.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,248.49 : 158,983.63 = 76,995.81 : x
  2. Step 2: Convert to fraction form
    115,248.49/158,983.63 = 76,995.81/x
  3. Step 3: Cross multiply
    115,248.49x = 158,983.63 × 76,995.81
  4. Step 4: Simplify right side
    115,248.49x = 12,241,073,176.10
  5. Step 5: Solve for x
    x = 12,241,073,176.10/115,248.49
  6. Step 6: Final answer
    x = 106,214.61

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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.