Home / 83,688.28-115,456.40-53,465.74

Finding the Fourth Proportional to 83,688.28, 115,456.40 and 53,465.74

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Solution

The fourth proportional to 83,688.28, 115,456.40 and 53,465.74 is: 73,761.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,688.28 : 115,456.40 = 53,465.74 : x
  2. Step 2: Convert to fraction form
    83,688.28/115,456.40 = 53,465.74/x
  3. Step 3: Cross multiply
    83,688.28x = 115,456.40 × 53,465.74
  4. Step 4: Simplify right side
    83,688.28x = 6,172,961,863.74
  5. Step 5: Solve for x
    x = 6,172,961,863.74/83,688.28
  6. Step 6: Final answer
    x = 73,761.37

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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.