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Finding the Fourth Proportional to 115,689.60, 173,562.12 and 39,786.84

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Solution

The fourth proportional to 115,689.60, 173,562.12 and 39,786.84 is: 59,689.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,689.60 : 173,562.12 = 39,786.84 : x
  2. Step 2: Convert to fraction form
    115,689.60/173,562.12 = 39,786.84/x
  3. Step 3: Cross multiply
    115,689.60x = 173,562.12 × 39,786.84
  4. Step 4: Simplify right side
    115,689.60x = 6,905,488,298.50
  5. Step 5: Solve for x
    x = 6,905,488,298.50/115,689.60
  6. Step 6: Final answer
    x = 59,689.79

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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.