Home / 128,370.30-192,555.45-39,615.90

Finding the Fourth Proportional to 128,370.30, 192,555.45 and 39,615.90

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Solution

The fourth proportional to 128,370.30, 192,555.45 and 39,615.90 is: 59,423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,370.30 : 192,555.45 = 39,615.90 : x
  2. Step 2: Convert to fraction form
    128,370.30/192,555.45 = 39,615.90/x
  3. Step 3: Cross multiply
    128,370.30x = 192,555.45 × 39,615.90
  4. Step 4: Simplify right side
    128,370.30x = 7,628,257,451.66
  5. Step 5: Solve for x
    x = 7,628,257,451.66/128,370.30
  6. Step 6: Final answer
    x = 59,423.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.