Home / 142,770.21-197,023.12-78,229.19

Finding the Fourth Proportional to 142,770.21, 197,023.12 and 78,229.19

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Solution

The fourth proportional to 142,770.21, 197,023.12 and 78,229.19 is: 107,956.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,770.21 : 197,023.12 = 78,229.19 : x
  2. Step 2: Convert to fraction form
    142,770.21/197,023.12 = 78,229.19/x
  3. Step 3: Cross multiply
    142,770.21x = 197,023.12 × 78,229.19
  4. Step 4: Simplify right side
    142,770.21x = 15,412,958,647.02
  5. Step 5: Solve for x
    x = 15,412,958,647.02/142,770.21
  6. Step 6: Final answer
    x = 107,956.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.