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Finding the Fourth Proportional to 158,572.80, 218,832.56 and 86,952.64

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Solution

The fourth proportional to 158,572.80, 218,832.56 and 86,952.64 is: 119,995.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,572.80 : 218,832.56 = 86,952.64 : x
  2. Step 2: Convert to fraction form
    158,572.80/218,832.56 = 86,952.64/x
  3. Step 3: Cross multiply
    158,572.80x = 218,832.56 × 86,952.64
  4. Step 4: Simplify right side
    158,572.80x = 19,028,068,809.96
  5. Step 5: Solve for x
    x = 19,028,068,809.96/158,572.80
  6. Step 6: Final answer
    x = 119,995.79

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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.