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Finding the Fourth Proportional to 66,093.61, 91,209.21 and 35,878.90

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Solution

The fourth proportional to 66,093.61, 91,209.21 and 35,878.90 is: 49,512.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,093.61 : 91,209.21 = 35,878.90 : x
  2. Step 2: Convert to fraction form
    66,093.61/91,209.21 = 35,878.90/x
  3. Step 3: Cross multiply
    66,093.61x = 91,209.21 × 35,878.90
  4. Step 4: Simplify right side
    66,093.61x = 3,272,486,124.67
  5. Step 5: Solve for x
    x = 3,272,486,124.67/66,093.61
  6. Step 6: Final answer
    x = 49,512.90

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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.