Home / 67,178.81-100,768.23-20,431.69

Finding the Fourth Proportional to 67,178.81, 100,768.23 and 20,431.69

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Solution

The fourth proportional to 67,178.81, 100,768.23 and 20,431.69 is: 30,647.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,178.81 : 100,768.23 = 20,431.69 : x
  2. Step 2: Convert to fraction form
    67,178.81/100,768.23 = 20,431.69/x
  3. Step 3: Cross multiply
    67,178.81x = 100,768.23 × 20,431.69
  4. Step 4: Simplify right side
    67,178.81x = 2,058,864,985.29
  5. Step 5: Solve for x
    x = 2,058,864,985.29/67,178.81
  6. Step 6: Final answer
    x = 30,647.53

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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.