Home / 82,639.20-123,958.80-51,146.40

Finding the Fourth Proportional to 82,639.20, 123,958.80 and 51,146.40

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Solution

The fourth proportional to 82,639.20, 123,958.80 and 51,146.40 is: 76,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,639.20 : 123,958.80 = 51,146.40 : x
  2. Step 2: Convert to fraction form
    82,639.20/123,958.80 = 51,146.40/x
  3. Step 3: Cross multiply
    82,639.20x = 123,958.80 × 51,146.40
  4. Step 4: Simplify right side
    82,639.20x = 6,340,046,368.32
  5. Step 5: Solve for x
    x = 6,340,046,368.32/82,639.20
  6. Step 6: Final answer
    x = 76,719.60

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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.