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Finding the Fourth Proportional to 85,983.38, 118,651.28 and 47,740.94

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Solution

The fourth proportional to 85,983.38, 118,651.28 and 47,740.94 is: 65,879.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,983.38 : 118,651.28 = 47,740.94 : x
  2. Step 2: Convert to fraction form
    85,983.38/118,651.28 = 47,740.94/x
  3. Step 3: Cross multiply
    85,983.38x = 118,651.28 × 47,740.94
  4. Step 4: Simplify right side
    85,983.38x = 5,664,523,639.40
  5. Step 5: Solve for x
    x = 5,664,523,639.40/85,983.38
  6. Step 6: Final answer
    x = 65,879.29

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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.