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Finding the Fourth Proportional to 212,098.55, 318,131.28 and 123,295.41

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Solution

The fourth proportional to 212,098.55, 318,131.28 and 123,295.41 is: 184,933.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,098.55 : 318,131.28 = 123,295.41 : x
  2. Step 2: Convert to fraction form
    212,098.55/318,131.28 = 123,295.41/x
  3. Step 3: Cross multiply
    212,098.55x = 318,131.28 × 123,295.41
  4. Step 4: Simplify right side
    212,098.55x = 39,224,125,984.95
  5. Step 5: Solve for x
    x = 39,224,125,984.95/212,098.55
  6. Step 6: Final answer
    x = 184,933.49

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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.