Home / 87,639.40-131,459.10-83,338.60

Finding the Fourth Proportional to 87,639.40, 131,459.10 and 83,338.60

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Solution

The fourth proportional to 87,639.40, 131,459.10 and 83,338.60 is: 125,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,639.40 : 131,459.10 = 83,338.60 : x
  2. Step 2: Convert to fraction form
    87,639.40/131,459.10 = 83,338.60/x
  3. Step 3: Cross multiply
    87,639.40x = 131,459.10 × 83,338.60
  4. Step 4: Simplify right side
    87,639.40x = 10,955,617,351.26
  5. Step 5: Solve for x
    x = 10,955,617,351.26/87,639.40
  6. Step 6: Final answer
    x = 125,007.90

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1.5x scale

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.