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Finding the Fourth Proportional to 61,209.43, 91,740.33 and 31,611.13

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Solution

The fourth proportional to 61,209.43, 91,740.33 and 31,611.13 is: 47,378.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,209.43 : 91,740.33 = 31,611.13 : x
  2. Step 2: Convert to fraction form
    61,209.43/91,740.33 = 31,611.13/x
  3. Step 3: Cross multiply
    61,209.43x = 91,740.33 × 31,611.13
  4. Step 4: Simplify right side
    61,209.43x = 2,900,015,497.87
  5. Step 5: Solve for x
    x = 2,900,015,497.87/61,209.43
  6. Step 6: Final answer
    x = 47,378.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.