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Finding the Fourth Proportional to 212,563.95, 318,836.70 and 79,445.36

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Solution

The fourth proportional to 212,563.95, 318,836.70 and 79,445.36 is: 119,164.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,563.95 : 318,836.70 = 79,445.36 : x
  2. Step 2: Convert to fraction form
    212,563.95/318,836.70 = 79,445.36/x
  3. Step 3: Cross multiply
    212,563.95x = 318,836.70 × 79,445.36
  4. Step 4: Simplify right side
    212,563.95x = 25,330,096,412.71
  5. Step 5: Solve for x
    x = 25,330,096,412.71/212,563.95
  6. Step 6: Final answer
    x = 119,164.59

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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.