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Finding the Fourth Proportional to 212,304.27, 318,509.87 and 79,188.87

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Solution

The fourth proportional to 212,304.27, 318,509.87 and 79,188.87 is: 118,803.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,304.27 : 318,509.87 = 79,188.87 : x
  2. Step 2: Convert to fraction form
    212,304.27/318,509.87 = 79,188.87/x
  3. Step 3: Cross multiply
    212,304.27x = 318,509.87 × 79,188.87
  4. Step 4: Simplify right side
    212,304.27x = 25,222,436,689.15
  5. Step 5: Solve for x
    x = 25,222,436,689.15/212,304.27
  6. Step 6: Final answer
    x = 118,803.25

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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.