Home / 67,178.04-100,767.42-20,430.78

Finding the Fourth Proportional to 67,178.04, 100,767.42 and 20,430.78

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Solution

The fourth proportional to 67,178.04, 100,767.42 and 20,430.78 is: 30,646.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,178.04 : 100,767.42 = 20,430.78 : x
  2. Step 2: Convert to fraction form
    67,178.04/100,767.42 = 20,430.78/x
  3. Step 3: Cross multiply
    67,178.04x = 100,767.42 × 20,430.78
  4. Step 4: Simplify right side
    67,178.04x = 2,058,756,989.19
  5. Step 5: Solve for x
    x = 2,058,756,989.19/67,178.04
  6. Step 6: Final answer
    x = 30,646.28

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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.