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Finding the Fourth Proportional to 323,770.10, 485,655.15 and 87,136.70

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Solution

The fourth proportional to 323,770.10, 485,655.15 and 87,136.70 is: 130,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,770.10 : 485,655.15 = 87,136.70 : x
  2. Step 2: Convert to fraction form
    323,770.10/485,655.15 = 87,136.70/x
  3. Step 3: Cross multiply
    323,770.10x = 485,655.15 × 87,136.70
  4. Step 4: Simplify right side
    323,770.10x = 42,318,387,109.01
  5. Step 5: Solve for x
    x = 42,318,387,109.01/323,770.10
  6. Step 6: Final answer
    x = 130,705.05

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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.