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Finding the Fourth Proportional to 81,102.40, 111,920.13 and 45,292.91

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Solution

The fourth proportional to 81,102.40, 111,920.13 and 45,292.91 is: 62,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,102.40 : 111,920.13 = 45,292.91 : x
  2. Step 2: Convert to fraction form
    81,102.40/111,920.13 = 45,292.91/x
  3. Step 3: Cross multiply
    81,102.40x = 111,920.13 × 45,292.91
  4. Step 4: Simplify right side
    81,102.40x = 5,069,187,815.68
  5. Step 5: Solve for x
    x = 5,069,187,815.68/81,102.40
  6. Step 6: Final answer
    x = 62,503.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.