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Finding the Fourth Proportional to 71,555.88, 107,214.42 and 31,515.24

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Solution

The fourth proportional to 71,555.88, 107,214.42 and 31,515.24 is: 47,220.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,555.88 : 107,214.42 = 31,515.24 : x
  2. Step 2: Convert to fraction form
    71,555.88/107,214.42 = 31,515.24/x
  3. Step 3: Cross multiply
    71,555.88x = 107,214.42 × 31,515.24
  4. Step 4: Simplify right side
    71,555.88x = 3,378,888,177.76
  5. Step 5: Solve for x
    x = 3,378,888,177.76/71,555.88
  6. Step 6: Final answer
    x = 47,220.27

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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.