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Finding the Fourth Proportional to 51,611.70, 71,224.92 and 28,955.70

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Solution

The fourth proportional to 51,611.70, 71,224.92 and 28,955.70 is: 39,959.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,611.70 : 71,224.92 = 28,955.70 : x
  2. Step 2: Convert to fraction form
    51,611.70/71,224.92 = 28,955.70/x
  3. Step 3: Cross multiply
    51,611.70x = 71,224.92 × 28,955.70
  4. Step 4: Simplify right side
    51,611.70x = 2,062,367,416.04
  5. Step 5: Solve for x
    x = 2,062,367,416.04/51,611.70
  6. Step 6: Final answer
    x = 39,959.30

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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.