Home / 78,021.11-107,668.85-42,211.13

Finding the Fourth Proportional to 78,021.11, 107,668.85 and 42,211.13

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Solution

The fourth proportional to 78,021.11, 107,668.85 and 42,211.13 is: 58,251.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,021.11 : 107,668.85 = 42,211.13 : x
  2. Step 2: Convert to fraction form
    78,021.11/107,668.85 = 42,211.13/x
  3. Step 3: Cross multiply
    78,021.11x = 107,668.85 × 42,211.13
  4. Step 4: Simplify right side
    78,021.11x = 4,544,823,824.30
  5. Step 5: Solve for x
    x = 4,544,823,824.30/78,021.11
  6. Step 6: Final answer
    x = 58,251.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.