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Finding the Fourth Proportional to 90,612.80, 124,995.29 and 84,198.14

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Solution

The fourth proportional to 90,612.80, 124,995.29 and 84,198.14 is: 116,146.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,612.80 : 124,995.29 = 84,198.14 : x
  2. Step 2: Convert to fraction form
    90,612.80/124,995.29 = 84,198.14/x
  3. Step 3: Cross multiply
    90,612.80x = 124,995.29 × 84,198.14
  4. Step 4: Simplify right side
    90,612.80x = 10,524,370,926.76
  5. Step 5: Solve for x
    x = 10,524,370,926.76/90,612.80
  6. Step 6: Final answer
    x = 116,146.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.