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Finding the Fourth Proportional to 212,617.76, 318,918.66 and 52,694.22

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Solution

The fourth proportional to 212,617.76, 318,918.66 and 52,694.22 is: 79,039.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,617.76 : 318,918.66 = 52,694.22 : x
  2. Step 2: Convert to fraction form
    212,617.76/318,918.66 = 52,694.22/x
  3. Step 3: Cross multiply
    212,617.76x = 318,918.66 × 52,694.22
  4. Step 4: Simplify right side
    212,617.76x = 16,805,170,032.15
  5. Step 5: Solve for x
    x = 16,805,170,032.15/212,617.76
  6. Step 6: Final answer
    x = 79,039.35

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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.