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Finding the Fourth Proportional to 158,363.64, 218,541.90 and 86,744.84

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Solution

The fourth proportional to 158,363.64, 218,541.90 and 86,744.84 is: 119,707.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,363.64 : 218,541.90 = 86,744.84 : x
  2. Step 2: Convert to fraction form
    158,363.64/218,541.90 = 86,744.84/x
  3. Step 3: Cross multiply
    158,363.64x = 218,541.90 × 86,744.84
  4. Step 4: Simplify right side
    158,363.64x = 18,957,382,148.80
  5. Step 5: Solve for x
    x = 18,957,382,148.80/158,363.64
  6. Step 6: Final answer
    x = 119,707.92

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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.