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Finding the Fourth Proportional to 115,703.60, 173,209.80 and 68,932.40

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Solution

The fourth proportional to 115,703.60, 173,209.80 and 68,932.40 is: 103,192.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,703.60 : 173,209.80 = 68,932.40 : x
  2. Step 2: Convert to fraction form
    115,703.60/173,209.80 = 68,932.40/x
  3. Step 3: Cross multiply
    115,703.60x = 173,209.80 × 68,932.40
  4. Step 4: Simplify right side
    115,703.60x = 11,939,767,217.52
  5. Step 5: Solve for x
    x = 11,939,767,217.52/115,703.60
  6. Step 6: Final answer
    x = 103,192.70

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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.