Home / 78,259.05-117,360.70-28,326.20

Finding the Fourth Proportional to 78,259.05, 117,360.70 and 28,326.20

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Solution

The fourth proportional to 78,259.05, 117,360.70 and 28,326.20 is: 42,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,259.05 : 117,360.70 = 28,326.20 : x
  2. Step 2: Convert to fraction form
    78,259.05/117,360.70 = 28,326.20/x
  3. Step 3: Cross multiply
    78,259.05x = 117,360.70 × 28,326.20
  4. Step 4: Simplify right side
    78,259.05x = 3,324,382,002.72
  5. Step 5: Solve for x
    x = 3,324,382,002.72/78,259.05
  6. Step 6: Final answer
    x = 42,479.20

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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.