Home / 78,530.20-117,795.30-77,234.20

Finding the Fourth Proportional to 78,530.20, 117,795.30 and 77,234.20

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Solution

The fourth proportional to 78,530.20, 117,795.30 and 77,234.20 is: 115,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,530.20 : 117,795.30 = 77,234.20 : x
  2. Step 2: Convert to fraction form
    78,530.20/117,795.30 = 77,234.20/x
  3. Step 3: Cross multiply
    78,530.20x = 117,795.30 × 77,234.20
  4. Step 4: Simplify right side
    78,530.20x = 9,097,825,759.26
  5. Step 5: Solve for x
    x = 9,097,825,759.26/78,530.20
  6. Step 6: Final answer
    x = 115,851.30

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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.