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Finding the Fourth Proportional to 212,172.52, 318,191.42 and 71,898.28

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Solution

The fourth proportional to 212,172.52, 318,191.42 and 71,898.28 is: 107,824.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,172.52 : 318,191.42 = 71,898.28 : x
  2. Step 2: Convert to fraction form
    212,172.52/318,191.42 = 71,898.28/x
  3. Step 3: Cross multiply
    212,172.52x = 318,191.42 × 71,898.28
  4. Step 4: Simplify right side
    212,172.52x = 22,877,415,808.76
  5. Step 5: Solve for x
    x = 22,877,415,808.76/212,172.52
  6. Step 6: Final answer
    x = 107,824.59

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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.