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Finding the Fourth Proportional to 66,118.92, 91,218.30 and 37,809.48

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Solution

The fourth proportional to 66,118.92, 91,218.30 and 37,809.48 is: 52,162.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,118.92 : 91,218.30 = 37,809.48 : x
  2. Step 2: Convert to fraction form
    66,118.92/91,218.30 = 37,809.48/x
  3. Step 3: Cross multiply
    66,118.92x = 91,218.30 × 37,809.48
  4. Step 4: Simplify right side
    66,118.92x = 3,448,916,489.48
  5. Step 5: Solve for x
    x = 3,448,916,489.48/66,118.92
  6. Step 6: Final answer
    x = 52,162.32

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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.