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Finding the Fourth Proportional to 104,423.72, 143,995.80 and 61,974.05

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Solution

The fourth proportional to 104,423.72, 143,995.80 and 61,974.05 is: 85,459.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,423.72 : 143,995.80 = 61,974.05 : x
  2. Step 2: Convert to fraction form
    104,423.72/143,995.80 = 61,974.05/x
  3. Step 3: Cross multiply
    104,423.72x = 143,995.80 × 61,974.05
  4. Step 4: Simplify right side
    104,423.72x = 8,924,002,189.01
  5. Step 5: Solve for x
    x = 8,924,002,189.01/104,423.72
  6. Step 6: Final answer
    x = 85,459.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.