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Finding the Fourth Proportional to 158,264.20, 218,407.20 and 86,643.04

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Solution

The fourth proportional to 158,264.20, 218,407.20 and 86,643.04 is: 119,568.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,264.20 : 218,407.20 = 86,643.04 : x
  2. Step 2: Convert to fraction form
    158,264.20/218,407.20 = 86,643.04/x
  3. Step 3: Cross multiply
    158,264.20x = 218,407.20 × 86,643.04
  4. Step 4: Simplify right side
    158,264.20x = 18,923,463,765.89
  5. Step 5: Solve for x
    x = 18,923,463,765.89/158,264.20
  6. Step 6: Final answer
    x = 119,568.82

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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.