Home / 81,358.12-121,815.24-61,576.84

Finding the Fourth Proportional to 81,358.12, 121,815.24 and 61,576.84

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Solution

The fourth proportional to 81,358.12, 121,815.24 and 61,576.84 is: 92,197.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,358.12 : 121,815.24 = 61,576.84 : x
  2. Step 2: Convert to fraction form
    81,358.12/121,815.24 = 61,576.84/x
  3. Step 3: Cross multiply
    81,358.12x = 121,815.24 × 61,576.84
  4. Step 4: Simplify right side
    81,358.12x = 7,500,997,543.04
  5. Step 5: Solve for x
    x = 7,500,997,543.04/81,358.12
  6. Step 6: Final answer
    x = 92,197.28

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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.