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Finding the Fourth Proportional to 66,612.36, 91,922.30 and 36,398.70

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Solution

The fourth proportional to 66,612.36, 91,922.30 and 36,398.70 is: 50,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,612.36 : 91,922.30 = 36,398.70 : x
  2. Step 2: Convert to fraction form
    66,612.36/91,922.30 = 36,398.70/x
  3. Step 3: Cross multiply
    66,612.36x = 91,922.30 × 36,398.70
  4. Step 4: Simplify right side
    66,612.36x = 3,345,852,221.01
  5. Step 5: Solve for x
    x = 3,345,852,221.01/66,612.36
  6. Step 6: Final answer
    x = 50,228.70

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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.