Home / 102,787.20-141,682.24-83,891.84

Finding the Fourth Proportional to 102,787.20, 141,682.24 and 83,891.84

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Solution

The fourth proportional to 102,787.20, 141,682.24 and 83,891.84 is: 115,636.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,787.20 : 141,682.24 = 83,891.84 : x
  2. Step 2: Convert to fraction form
    102,787.20/141,682.24 = 83,891.84/x
  3. Step 3: Cross multiply
    102,787.20x = 141,682.24 × 83,891.84
  4. Step 4: Simplify right side
    102,787.20x = 11,885,983,808.92
  5. Step 5: Solve for x
    x = 11,885,983,808.92/102,787.20
  6. Step 6: Final answer
    x = 115,636.81

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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.