Home / 112,342.40-154,768.82-78,288.99

Finding the Fourth Proportional to 112,342.40, 154,768.82 and 78,288.99

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Solution

The fourth proportional to 112,342.40, 154,768.82 and 78,288.99 is: 107,855.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,342.40 : 154,768.82 = 78,288.99 : x
  2. Step 2: Convert to fraction form
    112,342.40/154,768.82 = 78,288.99/x
  3. Step 3: Cross multiply
    112,342.40x = 154,768.82 × 78,288.99
  4. Step 4: Simplify right side
    112,342.40x = 12,116,694,209.85
  5. Step 5: Solve for x
    x = 12,116,694,209.85/112,342.40
  6. Step 6: Final answer
    x = 107,855.04

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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.