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Finding the Fourth Proportional to 45,487.70, 68,231.55 and 40,676.30

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Solution

The fourth proportional to 45,487.70, 68,231.55 and 40,676.30 is: 61,014.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,487.70 : 68,231.55 = 40,676.30 : x
  2. Step 2: Convert to fraction form
    45,487.70/68,231.55 = 40,676.30/x
  3. Step 3: Cross multiply
    45,487.70x = 68,231.55 × 40,676.30
  4. Step 4: Simplify right side
    45,487.70x = 2,775,406,997.27
  5. Step 5: Solve for x
    x = 2,775,406,997.27/45,487.70
  6. Step 6: Final answer
    x = 61,014.45

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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.