Home / 81,851.11-122,833.04-28,543.49

Finding the Fourth Proportional to 81,851.11, 122,833.04 and 28,543.49

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Solution

The fourth proportional to 81,851.11, 122,833.04 and 28,543.49 is: 42,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,851.11 : 122,833.04 = 28,543.49 : x
  2. Step 2: Convert to fraction form
    81,851.11/122,833.04 = 28,543.49/x
  3. Step 3: Cross multiply
    81,851.11x = 122,833.04 × 28,543.49
  4. Step 4: Simplify right side
    81,851.11x = 3,506,083,813.27
  5. Step 5: Solve for x
    x = 3,506,083,813.27/81,851.11
  6. Step 6: Final answer
    x = 42,834.90

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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.