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Finding the Fourth Proportional to 81,737.79, 112,811.52 and 68,104.20

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Solution

The fourth proportional to 81,737.79, 112,811.52 and 68,104.20 is: 93,994.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,737.79 : 112,811.52 = 68,104.20 : x
  2. Step 2: Convert to fraction form
    81,737.79/112,811.52 = 68,104.20/x
  3. Step 3: Cross multiply
    81,737.79x = 112,811.52 × 68,104.20
  4. Step 4: Simplify right side
    81,737.79x = 7,682,938,320.38
  5. Step 5: Solve for x
    x = 7,682,938,320.38/81,737.79
  6. Step 6: Final answer
    x = 93,994.94

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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.