Home / 81,564.12-112,439.34-57,648.60

Finding the Fourth Proportional to 81,564.12, 112,439.34 and 57,648.60

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Solution

The fourth proportional to 81,564.12, 112,439.34 and 57,648.60 is: 79,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,564.12 : 112,439.34 = 57,648.60 : x
  2. Step 2: Convert to fraction form
    81,564.12/112,439.34 = 57,648.60/x
  3. Step 3: Cross multiply
    81,564.12x = 112,439.34 × 57,648.60
  4. Step 4: Simplify right side
    81,564.12x = 6,481,970,535.92
  5. Step 5: Solve for x
    x = 6,481,970,535.92/81,564.12
  6. Step 6: Final answer
    x = 79,470.86

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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.