Home / 81,929.12-113,001.81-61,786.85

Finding the Fourth Proportional to 81,929.12, 113,001.81 and 61,786.85

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Solution

The fourth proportional to 81,929.12, 113,001.81 and 61,786.85 is: 85,220.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,929.12 : 113,001.81 = 61,786.85 : x
  2. Step 2: Convert to fraction form
    81,929.12/113,001.81 = 61,786.85/x
  3. Step 3: Cross multiply
    81,929.12x = 113,001.81 × 61,786.85
  4. Step 4: Simplify right side
    81,929.12x = 6,982,025,884.20
  5. Step 5: Solve for x
    x = 6,982,025,884.20/81,929.12
  6. Step 6: Final answer
    x = 85,220.32

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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.