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Finding the Fourth Proportional to 212,411.80, 318,616.89 and 79,325.56

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Solution

The fourth proportional to 212,411.80, 318,616.89 and 79,325.56 is: 118,988.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,411.80 : 318,616.89 = 79,325.56 : x
  2. Step 2: Convert to fraction form
    212,411.80/318,616.89 = 79,325.56/x
  3. Step 3: Cross multiply
    212,411.80x = 318,616.89 × 79,325.56
  4. Step 4: Simplify right side
    212,411.80x = 25,274,463,224.71
  5. Step 5: Solve for x
    x = 25,274,463,224.71/212,411.80
  6. Step 6: Final answer
    x = 118,988.04

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1.5x scale

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.