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Finding the Fourth Proportional to 381,854.55, 572,783.40 and 129,136.35

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Solution

The fourth proportional to 381,854.55, 572,783.40 and 129,136.35 is: 193,705.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,854.55 : 572,783.40 = 129,136.35 : x
  2. Step 2: Convert to fraction form
    381,854.55/572,783.40 = 129,136.35/x
  3. Step 3: Cross multiply
    381,854.55x = 572,783.40 × 129,136.35
  4. Step 4: Simplify right side
    381,854.55x = 73,967,157,616.59
  5. Step 5: Solve for x
    x = 73,967,157,616.59/381,854.55
  6. Step 6: Final answer
    x = 193,705.06

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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.