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Finding the Fourth Proportional to 158,264.70, 218,407.89 and 86,643.54

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Solution

The fourth proportional to 158,264.70, 218,407.89 and 86,643.54 is: 119,569.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,264.70 : 218,407.89 = 86,643.54 : x
  2. Step 2: Convert to fraction form
    158,264.70/218,407.89 = 86,643.54/x
  3. Step 3: Cross multiply
    158,264.70x = 218,407.89 × 86,643.54
  4. Step 4: Simplify right side
    158,264.70x = 18,923,632,753.53
  5. Step 5: Solve for x
    x = 18,923,632,753.53/158,264.70
  6. Step 6: Final answer
    x = 119,569.51

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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.