Home / 82,143.18-123,253.11-80,816.40

Finding the Fourth Proportional to 82,143.18, 123,253.11 and 80,816.40

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Solution

The fourth proportional to 82,143.18, 123,253.11 and 80,816.40 is: 121,262.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,143.18 : 123,253.11 = 80,816.40 : x
  2. Step 2: Convert to fraction form
    82,143.18/123,253.11 = 80,816.40/x
  3. Step 3: Cross multiply
    82,143.18x = 123,253.11 × 80,816.40
  4. Step 4: Simplify right side
    82,143.18x = 9,960,872,639.00
  5. Step 5: Solve for x
    x = 9,960,872,639.00/82,143.18
  6. Step 6: Final answer
    x = 121,262.32

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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.