Home / 81,135.86-121,714.02-27,813.38

Finding the Fourth Proportional to 81,135.86, 121,714.02 and 27,813.38

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Solution

The fourth proportional to 81,135.86, 121,714.02 and 27,813.38 is: 41,723.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,135.86 : 121,714.02 = 27,813.38 : x
  2. Step 2: Convert to fraction form
    81,135.86/121,714.02 = 27,813.38/x
  3. Step 3: Cross multiply
    81,135.86x = 121,714.02 × 27,813.38
  4. Step 4: Simplify right side
    81,135.86x = 3,385,277,681.02
  5. Step 5: Solve for x
    x = 3,385,277,681.02/81,135.86
  6. Step 6: Final answer
    x = 41,723.57

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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.