Home / 53,115.20-79,678.56-19,851.20

Finding the Fourth Proportional to 53,115.20, 79,678.56 and 19,851.20

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Solution

The fourth proportional to 53,115.20, 79,678.56 and 19,851.20 is: 29,778.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,115.20 : 79,678.56 = 19,851.20 : x
  2. Step 2: Convert to fraction form
    53,115.20/79,678.56 = 19,851.20/x
  3. Step 3: Cross multiply
    53,115.20x = 79,678.56 × 19,851.20
  4. Step 4: Simplify right side
    53,115.20x = 1,581,715,030.27
  5. Step 5: Solve for x
    x = 1,581,715,030.27/53,115.20
  6. Step 6: Final answer
    x = 29,778.95

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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.