Home / 128,535.20-192,802.80-39,815.90

Finding the Fourth Proportional to 128,535.20, 192,802.80 and 39,815.90

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Solution

The fourth proportional to 128,535.20, 192,802.80 and 39,815.90 is: 59,723.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,535.20 : 192,802.80 = 39,815.90 : x
  2. Step 2: Convert to fraction form
    128,535.20/192,802.80 = 39,815.90/x
  3. Step 3: Cross multiply
    128,535.20x = 192,802.80 × 39,815.90
  4. Step 4: Simplify right side
    128,535.20x = 7,676,617,004.52
  5. Step 5: Solve for x
    x = 7,676,617,004.52/128,535.20
  6. Step 6: Final answer
    x = 59,723.85

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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.