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Finding the Fourth Proportional to 212,652.34, 318,967.91 and 79,522.81

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Solution

The fourth proportional to 212,652.34, 318,967.91 and 79,522.81 is: 119,280.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,652.34 : 318,967.91 = 79,522.81 : x
  2. Step 2: Convert to fraction form
    212,652.34/318,967.91 = 79,522.81/x
  3. Step 3: Cross multiply
    212,652.34x = 318,967.91 × 79,522.81
  4. Step 4: Simplify right side
    212,652.34x = 25,365,223,606.20
  5. Step 5: Solve for x
    x = 25,365,223,606.20/212,652.34
  6. Step 6: Final answer
    x = 119,280.25

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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.