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Finding the Fourth Proportional to 66,410.61, 91,640.22 and 38,110.83

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Solution

The fourth proportional to 66,410.61, 91,640.22 and 38,110.83 is: 52,589.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,410.61 : 91,640.22 = 38,110.83 : x
  2. Step 2: Convert to fraction form
    66,410.61/91,640.22 = 38,110.83/x
  3. Step 3: Cross multiply
    66,410.61x = 91,640.22 × 38,110.83
  4. Step 4: Simplify right side
    66,410.61x = 3,492,484,845.58
  5. Step 5: Solve for x
    x = 3,492,484,845.58/66,410.61
  6. Step 6: Final answer
    x = 52,589.26

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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.