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Finding the Fourth Proportional to 212,652.71, 318,968.47 and 79,523.18

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Solution

The fourth proportional to 212,652.71, 318,968.47 and 79,523.18 is: 119,280.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,652.71 : 318,968.47 = 79,523.18 : x
  2. Step 2: Convert to fraction form
    212,652.71/318,968.47 = 79,523.18/x
  3. Step 3: Cross multiply
    212,652.71x = 318,968.47 × 79,523.18
  4. Step 4: Simplify right side
    212,652.71x = 25,365,387,950.96
  5. Step 5: Solve for x
    x = 25,365,387,950.96/212,652.71
  6. Step 6: Final answer
    x = 119,280.81

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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.