Home / 81,283.92-121,887-34,511.28

Finding the Fourth Proportional to 81,283.92, 121,887 and 34,511.28

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Solution

The fourth proportional to 81,283.92, 121,887 and 34,511.28 is: 51,750.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,283.92 : 121,887 = 34,511.28 : x
  2. Step 2: Convert to fraction form
    81,283.92/121,887 = 34,511.28/x
  3. Step 3: Cross multiply
    81,283.92x = 121,887 × 34,511.28
  4. Step 4: Simplify right side
    81,283.92x = 4,206,476,385.36
  5. Step 5: Solve for x
    x = 4,206,476,385.36/81,283.92
  6. Step 6: Final answer
    x = 51,750.41

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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.