Home / 142,777.19-197,021.68-79,113.62

Finding the Fourth Proportional to 142,777.19, 197,021.68 and 79,113.62

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Solution

The fourth proportional to 142,777.19, 197,021.68 and 79,113.62 is: 109,170.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,777.19 : 197,021.68 = 79,113.62 : x
  2. Step 2: Convert to fraction form
    142,777.19/197,021.68 = 79,113.62/x
  3. Step 3: Cross multiply
    142,777.19x = 197,021.68 × 79,113.62
  4. Step 4: Simplify right side
    142,777.19x = 15,587,097,140.39
  5. Step 5: Solve for x
    x = 15,587,097,140.39/142,777.19
  6. Step 6: Final answer
    x = 109,170.78

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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.