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Finding the Fourth Proportional to 84,859.10, 127,288.65 and 82,915.10

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Solution

The fourth proportional to 84,859.10, 127,288.65 and 82,915.10 is: 124,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,859.10 : 127,288.65 = 82,915.10 : x
  2. Step 2: Convert to fraction form
    84,859.10/127,288.65 = 82,915.10/x
  3. Step 3: Cross multiply
    84,859.10x = 127,288.65 × 82,915.10
  4. Step 4: Simplify right side
    84,859.10x = 10,554,151,143.62
  5. Step 5: Solve for x
    x = 10,554,151,143.62/84,859.10
  6. Step 6: Final answer
    x = 124,372.65

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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.