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Finding the Fourth Proportional to 212,617.80, 318,926.70 and 162,851.40

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Solution

The fourth proportional to 212,617.80, 318,926.70 and 162,851.40 is: 244,277.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,617.80 : 318,926.70 = 162,851.40 : x
  2. Step 2: Convert to fraction form
    212,617.80/318,926.70 = 162,851.40/x
  3. Step 3: Cross multiply
    212,617.80x = 318,926.70 × 162,851.40
  4. Step 4: Simplify right side
    212,617.80x = 51,937,659,592.38
  5. Step 5: Solve for x
    x = 51,937,659,592.38/212,617.80
  6. Step 6: Final answer
    x = 244,277.10

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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.