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Finding the Fourth Proportional to 212,003.88, 318,020.54 and 71,715.08

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Solution

The fourth proportional to 212,003.88, 318,020.54 and 71,715.08 is: 107,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,003.88 : 318,020.54 = 71,715.08 : x
  2. Step 2: Convert to fraction form
    212,003.88/318,020.54 = 71,715.08/x
  3. Step 3: Cross multiply
    212,003.88x = 318,020.54 × 71,715.08
  4. Step 4: Simplify right side
    212,003.88x = 22,806,868,467.74
  5. Step 5: Solve for x
    x = 22,806,868,467.74/212,003.88
  6. Step 6: Final answer
    x = 107,577.60

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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.