Home / 81,519.60-112,496.96-49,688.40

Finding the Fourth Proportional to 81,519.60, 112,496.96 and 49,688.40

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Solution

The fourth proportional to 81,519.60, 112,496.96 and 49,688.40 is: 68,569.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,519.60 : 112,496.96 = 49,688.40 : x
  2. Step 2: Convert to fraction form
    81,519.60/112,496.96 = 49,688.40/x
  3. Step 3: Cross multiply
    81,519.60x = 112,496.96 × 49,688.40
  4. Step 4: Simplify right side
    81,519.60x = 5,589,793,947.26
  5. Step 5: Solve for x
    x = 5,589,793,947.26/81,519.60
  6. Step 6: Final answer
    x = 68,569.94

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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.