Home / 71,399.24-107,128.23-31,397.64

Finding the Fourth Proportional to 71,399.24, 107,128.23 and 31,397.64

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Solution

The fourth proportional to 71,399.24, 107,128.23 and 31,397.64 is: 47,109.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,399.24 : 107,128.23 = 31,397.64 : x
  2. Step 2: Convert to fraction form
    71,399.24/107,128.23 = 31,397.64/x
  3. Step 3: Cross multiply
    71,399.24x = 107,128.23 × 31,397.64
  4. Step 4: Simplify right side
    71,399.24x = 3,363,573,599.38
  5. Step 5: Solve for x
    x = 3,363,573,599.38/71,399.24
  6. Step 6: Final answer
    x = 47,109.38

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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.