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Finding the Fourth Proportional to 61,871.91, 85,378.53 and 36,379.32

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Solution

The fourth proportional to 61,871.91, 85,378.53 and 36,379.32 is: 50,200.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,871.91 : 85,378.53 = 36,379.32 : x
  2. Step 2: Convert to fraction form
    61,871.91/85,378.53 = 36,379.32/x
  3. Step 3: Cross multiply
    61,871.91x = 85,378.53 × 36,379.32
  4. Step 4: Simplify right side
    61,871.91x = 3,106,012,864.00
  5. Step 5: Solve for x
    x = 3,106,012,864.00/61,871.91
  6. Step 6: Final answer
    x = 50,200.69

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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.