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Finding the Fourth Proportional to 71,486.78, 107,230.94 and 21,567.30

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Solution

The fourth proportional to 71,486.78, 107,230.94 and 21,567.30 is: 32,351.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,486.78 : 107,230.94 = 21,567.30 : x
  2. Step 2: Convert to fraction form
    71,486.78/107,230.94 = 21,567.30/x
  3. Step 3: Cross multiply
    71,486.78x = 107,230.94 × 21,567.30
  4. Step 4: Simplify right side
    71,486.78x = 2,312,681,744.43
  5. Step 5: Solve for x
    x = 2,312,681,744.43/71,486.78
  6. Step 6: Final answer
    x = 32,351.18

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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.