Home / 78,729.36-108,642.24-45,195.36

Finding the Fourth Proportional to 78,729.36, 108,642.24 and 45,195.36

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Solution

The fourth proportional to 78,729.36, 108,642.24 and 45,195.36 is: 62,367.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,729.36 : 108,642.24 = 45,195.36 : x
  2. Step 2: Convert to fraction form
    78,729.36/108,642.24 = 45,195.36/x
  3. Step 3: Cross multiply
    78,729.36x = 108,642.24 × 45,195.36
  4. Step 4: Simplify right side
    78,729.36x = 4,910,125,148.01
  5. Step 5: Solve for x
    x = 4,910,125,148.01/78,729.36
  6. Step 6: Final answer
    x = 62,367.14

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1.5x scale

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.