Home / 128,079.09-192,124.13-39,336.12

Finding the Fourth Proportional to 128,079.09, 192,124.13 and 39,336.12

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Solution

The fourth proportional to 128,079.09, 192,124.13 and 39,336.12 is: 59,005.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,079.09 : 192,124.13 = 39,336.12 : x
  2. Step 2: Convert to fraction form
    128,079.09/192,124.13 = 39,336.12/x
  3. Step 3: Cross multiply
    128,079.09x = 192,124.13 × 39,336.12
  4. Step 4: Simplify right side
    128,079.09x = 7,557,417,635.90
  5. Step 5: Solve for x
    x = 7,557,417,635.90/128,079.09
  6. Step 6: Final answer
    x = 59,005.87

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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.