Home / 80,978.09-121,218-52,837.55

Finding the Fourth Proportional to 80,978.09, 121,218 and 52,837.55

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Solution

The fourth proportional to 80,978.09, 121,218 and 52,837.55 is: 79,093.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,978.09 : 121,218 = 52,837.55 : x
  2. Step 2: Convert to fraction form
    80,978.09/121,218 = 52,837.55/x
  3. Step 3: Cross multiply
    80,978.09x = 121,218 × 52,837.55
  4. Step 4: Simplify right side
    80,978.09x = 6,404,862,135.90
  5. Step 5: Solve for x
    x = 6,404,862,135.90/80,978.09
  6. Step 6: Final answer
    x = 79,093.77

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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.