Home / 81,281.92-121,884-34,509.28

Finding the Fourth Proportional to 81,281.92, 121,884 and 34,509.28

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Solution

The fourth proportional to 81,281.92, 121,884 and 34,509.28 is: 51,747.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,281.92 : 121,884 = 34,509.28 : x
  2. Step 2: Convert to fraction form
    81,281.92/121,884 = 34,509.28/x
  3. Step 3: Cross multiply
    81,281.92x = 121,884 × 34,509.28
  4. Step 4: Simplify right side
    81,281.92x = 4,206,129,083.52
  5. Step 5: Solve for x
    x = 4,206,129,083.52/81,281.92
  6. Step 6: Final answer
    x = 51,747.41

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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.