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Finding the Fourth Proportional to 212,441.70, 318,662.55 and 148,851.30

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Solution

The fourth proportional to 212,441.70, 318,662.55 and 148,851.30 is: 223,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,441.70 : 318,662.55 = 148,851.30 : x
  2. Step 2: Convert to fraction form
    212,441.70/318,662.55 = 148,851.30/x
  3. Step 3: Cross multiply
    212,441.70x = 318,662.55 × 148,851.30
  4. Step 4: Simplify right side
    212,441.70x = 47,433,334,828.82
  5. Step 5: Solve for x
    x = 47,433,334,828.82/212,441.70
  6. Step 6: Final answer
    x = 223,276.95

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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.