Home / 112,890.45-155,787.40-65,142.78

Finding the Fourth Proportional to 112,890.45, 155,787.40 and 65,142.78

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Solution

The fourth proportional to 112,890.45, 155,787.40 and 65,142.78 is: 89,896.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,890.45 : 155,787.40 = 65,142.78 : x
  2. Step 2: Convert to fraction form
    112,890.45/155,787.40 = 65,142.78/x
  3. Step 3: Cross multiply
    112,890.45x = 155,787.40 × 65,142.78
  4. Step 4: Simplify right side
    112,890.45x = 10,148,424,324.97
  5. Step 5: Solve for x
    x = 10,148,424,324.97/112,890.45
  6. Step 6: Final answer
    x = 89,896.22

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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.