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Finding the Fourth Proportional to 61,809.40, 85,286.86 and 40,614.94

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Solution

The fourth proportional to 61,809.40, 85,286.86 and 40,614.94 is: 56,041.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,809.40 : 85,286.86 = 40,614.94 : x
  2. Step 2: Convert to fraction form
    61,809.40/85,286.86 = 40,614.94/x
  3. Step 3: Cross multiply
    61,809.40x = 85,286.86 × 40,614.94
  4. Step 4: Simplify right side
    61,809.40x = 3,463,920,701.69
  5. Step 5: Solve for x
    x = 3,463,920,701.69/61,809.40
  6. Step 6: Final answer
    x = 56,041.97

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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.