Home / 80,775.18-121,436.45-65,090.34

Finding the Fourth Proportional to 80,775.18, 121,436.45 and 65,090.34

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Solution

The fourth proportional to 80,775.18, 121,436.45 and 65,090.34 is: 97,856.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,775.18 : 121,436.45 = 65,090.34 : x
  2. Step 2: Convert to fraction form
    80,775.18/121,436.45 = 65,090.34/x
  3. Step 3: Cross multiply
    80,775.18x = 121,436.45 × 65,090.34
  4. Step 4: Simplify right side
    80,775.18x = 7,904,339,493.44
  5. Step 5: Solve for x
    x = 7,904,339,493.44/80,775.18
  6. Step 6: Final answer
    x = 97,856.04

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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.