Home / 78,012.20-107,656.74-42,202.13

Finding the Fourth Proportional to 78,012.20, 107,656.74 and 42,202.13

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Solution

The fourth proportional to 78,012.20, 107,656.74 and 42,202.13 is: 58,238.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,012.20 : 107,656.74 = 42,202.13 : x
  2. Step 2: Convert to fraction form
    78,012.20/107,656.74 = 42,202.13/x
  3. Step 3: Cross multiply
    78,012.20x = 107,656.74 × 42,202.13
  4. Step 4: Simplify right side
    78,012.20x = 4,543,343,198.57
  5. Step 5: Solve for x
    x = 4,543,343,198.57/78,012.20
  6. Step 6: Final answer
    x = 58,238.88

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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.