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Finding the Fourth Proportional to 84,470.88, 126,605.20 and 39,431.64

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Solution

The fourth proportional to 84,470.88, 126,605.20 and 39,431.64 is: 59,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,470.88 : 126,605.20 = 39,431.64 : x
  2. Step 2: Convert to fraction form
    84,470.88/126,605.20 = 39,431.64/x
  3. Step 3: Cross multiply
    84,470.88x = 126,605.20 × 39,431.64
  4. Step 4: Simplify right side
    84,470.88x = 4,992,249,936.92
  5. Step 5: Solve for x
    x = 4,992,249,936.92/84,470.88
  6. Step 6: Final answer
    x = 59,100.25

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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.