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Finding the Fourth Proportional to 158,277.70, 218,414.58 and 86,643.87

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Solution

The fourth proportional to 158,277.70, 218,414.58 and 86,643.87 is: 119,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,277.70 : 218,414.58 = 86,643.87 : x
  2. Step 2: Convert to fraction form
    158,277.70/218,414.58 = 86,643.87/x
  3. Step 3: Cross multiply
    158,277.70x = 218,414.58 × 86,643.87
  4. Step 4: Simplify right side
    158,277.70x = 18,924,283,331.66
  5. Step 5: Solve for x
    x = 18,924,283,331.66/158,277.70
  6. Step 6: Final answer
    x = 119,563.80

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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.