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Finding the Fourth Proportional to 81,292.80, 112,123.80 and 57,394.56

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Solution

The fourth proportional to 81,292.80, 112,123.80 and 57,394.56 is: 79,161.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,292.80 : 112,123.80 = 57,394.56 : x
  2. Step 2: Convert to fraction form
    81,292.80/112,123.80 = 57,394.56/x
  3. Step 3: Cross multiply
    81,292.80x = 112,123.80 × 57,394.56
  4. Step 4: Simplify right side
    81,292.80x = 6,435,296,166.53
  5. Step 5: Solve for x
    x = 6,435,296,166.53/81,292.80
  6. Step 6: Final answer
    x = 79,161.95

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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.