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Finding the Fourth Proportional to 212,079.34, 318,110.70 and 71,837.96

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Solution

The fourth proportional to 212,079.34, 318,110.70 and 71,837.96 is: 107,754.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,079.34 : 318,110.70 = 71,837.96 : x
  2. Step 2: Convert to fraction form
    212,079.34/318,110.70 = 71,837.96/x
  3. Step 3: Cross multiply
    212,079.34x = 318,110.70 × 71,837.96
  4. Step 4: Simplify right side
    212,079.34x = 22,852,423,742.17
  5. Step 5: Solve for x
    x = 22,852,423,742.17/212,079.34
  6. Step 6: Final answer
    x = 107,754.13

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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.