Home / 81,149.18-111,977.66-55,677.47

Finding the Fourth Proportional to 81,149.18, 111,977.66 and 55,677.47

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Solution

The fourth proportional to 81,149.18, 111,977.66 and 55,677.47 is: 76,829.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.18 : 111,977.66 = 55,677.47 : x
  2. Step 2: Convert to fraction form
    81,149.18/111,977.66 = 55,677.47/x
  3. Step 3: Cross multiply
    81,149.18x = 111,977.66 × 55,677.47
  4. Step 4: Simplify right side
    81,149.18x = 6,234,631,967.04
  5. Step 5: Solve for x
    x = 6,234,631,967.04/81,149.18
  6. Step 6: Final answer
    x = 76,829.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.