Home / 81,283.73-121,935.98-31,378.11

Finding the Fourth Proportional to 81,283.73, 121,935.98 and 31,378.11

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Solution

The fourth proportional to 81,283.73, 121,935.98 and 31,378.11 is: 47,071.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,283.73 : 121,935.98 = 31,378.11 : x
  2. Step 2: Convert to fraction form
    81,283.73/121,935.98 = 31,378.11/x
  3. Step 3: Cross multiply
    81,283.73x = 121,935.98 × 31,378.11
  4. Step 4: Simplify right side
    81,283.73x = 3,826,120,593.40
  5. Step 5: Solve for x
    x = 3,826,120,593.40/81,283.73
  6. Step 6: Final answer
    x = 47,071.17

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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.