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Finding the Fourth Proportional to 212,657.80, 318,909.90 and 107,441.80

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Solution

The fourth proportional to 212,657.80, 318,909.90 and 107,441.80 is: 161,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,657.80 : 318,909.90 = 107,441.80 : x
  2. Step 2: Convert to fraction form
    212,657.80/318,909.90 = 107,441.80/x
  3. Step 3: Cross multiply
    212,657.80x = 318,909.90 × 107,441.80
  4. Step 4: Simplify right side
    212,657.80x = 34,264,253,693.82
  5. Step 5: Solve for x
    x = 34,264,253,693.82/212,657.80
  6. Step 6: Final answer
    x = 161,123.90

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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.