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Finding the Fourth Proportional to 221,457.40, 332,331.90 and 126,687.40

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Solution

The fourth proportional to 221,457.40, 332,331.90 and 126,687.40 is: 190,114.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,457.40 : 332,331.90 = 126,687.40 : x
  2. Step 2: Convert to fraction form
    221,457.40/332,331.90 = 126,687.40/x
  3. Step 3: Cross multiply
    221,457.40x = 332,331.90 × 126,687.40
  4. Step 4: Simplify right side
    221,457.40x = 42,102,264,348.06
  5. Step 5: Solve for x
    x = 42,102,264,348.06/221,457.40
  6. Step 6: Final answer
    x = 190,114.51

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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.