Home / 78,428.52-117,657.36-25,840.08

Finding the Fourth Proportional to 78,428.52, 117,657.36 and 25,840.08

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Solution

The fourth proportional to 78,428.52, 117,657.36 and 25,840.08 is: 38,764.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,428.52 : 117,657.36 = 25,840.08 : x
  2. Step 2: Convert to fraction form
    78,428.52/117,657.36 = 25,840.08/x
  3. Step 3: Cross multiply
    78,428.52x = 117,657.36 × 25,840.08
  4. Step 4: Simplify right side
    78,428.52x = 3,040,275,594.99
  5. Step 5: Solve for x
    x = 3,040,275,594.99/78,428.52
  6. Step 6: Final answer
    x = 38,764.92

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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.