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Finding the Fourth Proportional to 116,129.40, 173,853.90 and 86,677.80

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Solution

The fourth proportional to 116,129.40, 173,853.90 and 86,677.80 is: 129,762.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,129.40 : 173,853.90 = 86,677.80 : x
  2. Step 2: Convert to fraction form
    116,129.40/173,853.90 = 86,677.80/x
  3. Step 3: Cross multiply
    116,129.40x = 173,853.90 × 86,677.80
  4. Step 4: Simplify right side
    116,129.40x = 15,069,273,573.42
  5. Step 5: Solve for x
    x = 15,069,273,573.42/116,129.40
  6. Step 6: Final answer
    x = 129,762.78

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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.