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Finding the Fourth Proportional to 228,158.80, 342,261.66 and 86,123.71

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Solution

The fourth proportional to 228,158.80, 342,261.66 and 86,123.71 is: 129,194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,158.80 : 342,261.66 = 86,123.71 : x
  2. Step 2: Convert to fraction form
    228,158.80/342,261.66 = 86,123.71/x
  3. Step 3: Cross multiply
    228,158.80x = 342,261.66 × 86,123.71
  4. Step 4: Simplify right side
    228,158.80x = 29,476,843,949.96
  5. Step 5: Solve for x
    x = 29,476,843,949.96/228,158.80
  6. Step 6: Final answer
    x = 129,194.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.