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Finding the Fourth Proportional to 212,770.70, 318,884.70 and 112,978.70

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Solution

The fourth proportional to 212,770.70, 318,884.70 and 112,978.70 is: 169,323.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,770.70 : 318,884.70 = 112,978.70 : x
  2. Step 2: Convert to fraction form
    212,770.70/318,884.70 = 112,978.70/x
  3. Step 3: Cross multiply
    212,770.70x = 318,884.70 × 112,978.70
  4. Step 4: Simplify right side
    212,770.70x = 36,027,178,855.89
  5. Step 5: Solve for x
    x = 36,027,178,855.89/212,770.70
  6. Step 6: Final answer
    x = 169,323.97

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1.5x scale

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.