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Finding the Fourth Proportional to 158,381.96, 218,567.18 and 86,764.56

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Solution

The fourth proportional to 158,381.96, 218,567.18 and 86,764.56 is: 119,735.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,381.96 : 218,567.18 = 86,764.56 : x
  2. Step 2: Convert to fraction form
    158,381.96/218,567.18 = 86,764.56/x
  3. Step 3: Cross multiply
    158,381.96x = 218,567.18 × 86,764.56
  4. Step 4: Simplify right side
    158,381.96x = 18,963,885,203.14
  5. Step 5: Solve for x
    x = 18,963,885,203.14/158,381.96
  6. Step 6: Final answer
    x = 119,735.13

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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.