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Finding the Fourth Proportional to 158,493.12, 218,725.88 and 86,873.16

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Solution

The fourth proportional to 158,493.12, 218,725.88 and 86,873.16 is: 119,887.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,493.12 : 218,725.88 = 86,873.16 : x
  2. Step 2: Convert to fraction form
    158,493.12/218,725.88 = 86,873.16/x
  3. Step 3: Cross multiply
    158,493.12x = 218,725.88 × 86,873.16
  4. Step 4: Simplify right side
    158,493.12x = 19,001,408,369.38
  5. Step 5: Solve for x
    x = 19,001,408,369.38/158,493.12
  6. Step 6: Final answer
    x = 119,887.91

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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.