Home / 128,085.20-191,996.55-53,248.80

Finding the Fourth Proportional to 128,085.20, 191,996.55 and 53,248.80

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Solution

The fourth proportional to 128,085.20, 191,996.55 and 53,248.80 is: 79,818.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,085.20 : 191,996.55 = 53,248.80 : x
  2. Step 2: Convert to fraction form
    128,085.20/191,996.55 = 53,248.80/x
  3. Step 3: Cross multiply
    128,085.20x = 191,996.55 × 53,248.80
  4. Step 4: Simplify right side
    128,085.20x = 10,223,585,891.64
  5. Step 5: Solve for x
    x = 10,223,585,891.64/128,085.20
  6. Step 6: Final answer
    x = 79,818.64

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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.