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Finding the Fourth Proportional to 71,648.28, 107,494.11 and 28,931.76

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Solution

The fourth proportional to 71,648.28, 107,494.11 and 28,931.76 is: 43,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,648.28 : 107,494.11 = 28,931.76 : x
  2. Step 2: Convert to fraction form
    71,648.28/107,494.11 = 28,931.76/x
  3. Step 3: Cross multiply
    71,648.28x = 107,494.11 × 28,931.76
  4. Step 4: Simplify right side
    71,648.28x = 3,109,993,791.93
  5. Step 5: Solve for x
    x = 3,109,993,791.93/71,648.28
  6. Step 6: Final answer
    x = 43,406.40

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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.