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Finding the Fourth Proportional to 61,739.40, 92,609.10 and 20,186.40

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Solution

The fourth proportional to 61,739.40, 92,609.10 and 20,186.40 is: 30,279.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,739.40 : 92,609.10 = 20,186.40 : x
  2. Step 2: Convert to fraction form
    61,739.40/92,609.10 = 20,186.40/x
  3. Step 3: Cross multiply
    61,739.40x = 92,609.10 × 20,186.40
  4. Step 4: Simplify right side
    61,739.40x = 1,869,444,336.24
  5. Step 5: Solve for x
    x = 1,869,444,336.24/61,739.40
  6. Step 6: Final answer
    x = 30,279.60

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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.