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Finding the Fourth Proportional to 284,811.10, 426,871.05 and 126,871.90

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Solution

The fourth proportional to 284,811.10, 426,871.05 and 126,871.90 is: 190,153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,811.10 : 426,871.05 = 126,871.90 : x
  2. Step 2: Convert to fraction form
    284,811.10/426,871.05 = 126,871.90/x
  3. Step 3: Cross multiply
    284,811.10x = 426,871.05 × 126,871.90
  4. Step 4: Simplify right side
    284,811.10x = 54,157,941,168.50
  5. Step 5: Solve for x
    x = 54,157,941,168.50/284,811.10
  6. Step 6: Final answer
    x = 190,153.90

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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.