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Finding the Fourth Proportional to 221,931.28, 306,249.42 and 126,420.40

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Solution

The fourth proportional to 221,931.28, 306,249.42 and 126,420.40 is: 174,451.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,931.28 : 306,249.42 = 126,420.40 : x
  2. Step 2: Convert to fraction form
    221,931.28/306,249.42 = 126,420.40/x
  3. Step 3: Cross multiply
    221,931.28x = 306,249.42 × 126,420.40
  4. Step 4: Simplify right side
    221,931.28x = 38,716,174,176.17
  5. Step 5: Solve for x
    x = 38,716,174,176.17/221,931.28
  6. Step 6: Final answer
    x = 174,451.18

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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.