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Finding the Fourth Proportional to 212,647.59, 318,913.07 and 79,483.59

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Solution

The fourth proportional to 212,647.59, 318,913.07 and 79,483.59 is: 119,203.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,647.59 : 318,913.07 = 79,483.59 : x
  2. Step 2: Convert to fraction form
    212,647.59/318,913.07 = 79,483.59/x
  3. Step 3: Cross multiply
    212,647.59x = 318,913.07 × 79,483.59
  4. Step 4: Simplify right side
    212,647.59x = 25,348,355,304.10
  5. Step 5: Solve for x
    x = 25,348,355,304.10/212,647.59
  6. Step 6: Final answer
    x = 119,203.59

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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.