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Finding the Fourth Proportional to 84,679.94, 127,026.12 and 28,519.76

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Solution

The fourth proportional to 84,679.94, 127,026.12 and 28,519.76 is: 42,781.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,679.94 : 127,026.12 = 28,519.76 : x
  2. Step 2: Convert to fraction form
    84,679.94/127,026.12 = 28,519.76/x
  3. Step 3: Cross multiply
    84,679.94x = 127,026.12 × 28,519.76
  4. Step 4: Simplify right side
    84,679.94x = 3,622,754,456.13
  5. Step 5: Solve for x
    x = 3,622,754,456.13/84,679.94
  6. Step 6: Final answer
    x = 42,781.73

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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.