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Finding the Fourth Proportional to 61,803.86, 85,265.21 and 40,318.86

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Solution

The fourth proportional to 61,803.86, 85,265.21 and 40,318.86 is: 55,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,803.86 : 85,265.21 = 40,318.86 : x
  2. Step 2: Convert to fraction form
    61,803.86/85,265.21 = 40,318.86/x
  3. Step 3: Cross multiply
    61,803.86x = 85,265.21 × 40,318.86
  4. Step 4: Simplify right side
    61,803.86x = 3,437,796,258.61
  5. Step 5: Solve for x
    x = 3,437,796,258.61/61,803.86
  6. Step 6: Final answer
    x = 55,624.30

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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.