Home / 83,639.59-115,263.14-82,102.21

Finding the Fourth Proportional to 83,639.59, 115,263.14 and 82,102.21

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Solution

The fourth proportional to 83,639.59, 115,263.14 and 82,102.21 is: 113,144.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,639.59 : 115,263.14 = 82,102.21 : x
  2. Step 2: Convert to fraction form
    83,639.59/115,263.14 = 82,102.21/x
  3. Step 3: Cross multiply
    83,639.59x = 115,263.14 × 82,102.21
  4. Step 4: Simplify right side
    83,639.59x = 9,463,357,826.87
  5. Step 5: Solve for x
    x = 9,463,357,826.87/83,639.59
  6. Step 6: Final answer
    x = 113,144.48

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1.5x scale

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.