Home / 81,247.40-121,821.90-53,133.52

Finding the Fourth Proportional to 81,247.40, 121,821.90 and 53,133.52

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Solution

The fourth proportional to 81,247.40, 121,821.90 and 53,133.52 is: 79,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,247.40 : 121,821.90 = 53,133.52 : x
  2. Step 2: Convert to fraction form
    81,247.40/121,821.90 = 53,133.52/x
  3. Step 3: Cross multiply
    81,247.40x = 121,821.90 × 53,133.52
  4. Step 4: Simplify right side
    81,247.40x = 6,472,826,360.09
  5. Step 5: Solve for x
    x = 6,472,826,360.09/81,247.40
  6. Step 6: Final answer
    x = 79,668.10

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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.