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Finding the Fourth Proportional to 71,351.88, 107,023.71 and 21,430.87

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Solution

The fourth proportional to 71,351.88, 107,023.71 and 21,430.87 is: 32,145.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,351.88 : 107,023.71 = 21,430.87 : x
  2. Step 2: Convert to fraction form
    71,351.88/107,023.71 = 21,430.87/x
  3. Step 3: Cross multiply
    71,351.88x = 107,023.71 × 21,430.87
  4. Step 4: Simplify right side
    71,351.88x = 2,293,611,215.93
  5. Step 5: Solve for x
    x = 2,293,611,215.93/71,351.88
  6. Step 6: Final answer
    x = 32,145.07

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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.