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Finding the Fourth Proportional to 81,503.54, 122,244.93 and 31,549.46

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Solution

The fourth proportional to 81,503.54, 122,244.93 and 31,549.46 is: 47,320.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,503.54 : 122,244.93 = 31,549.46 : x
  2. Step 2: Convert to fraction form
    81,503.54/122,244.93 = 31,549.46/x
  3. Step 3: Cross multiply
    81,503.54x = 122,244.93 × 31,549.46
  4. Step 4: Simplify right side
    81,503.54x = 3,856,761,834.85
  5. Step 5: Solve for x
    x = 3,856,761,834.85/81,503.54
  6. Step 6: Final answer
    x = 47,320.17

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1.5x scale

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.