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Finding the Fourth Proportional to 81,815.70, 122,637.15 and 46,679.70

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Solution

The fourth proportional to 81,815.70, 122,637.15 and 46,679.70 is: 69,970.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,815.70 : 122,637.15 = 46,679.70 : x
  2. Step 2: Convert to fraction form
    81,815.70/122,637.15 = 46,679.70/x
  3. Step 3: Cross multiply
    81,815.70x = 122,637.15 × 46,679.70
  4. Step 4: Simplify right side
    81,815.70x = 5,724,665,370.86
  5. Step 5: Solve for x
    x = 5,724,665,370.86/81,815.70
  6. Step 6: Final answer
    x = 69,970.25

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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.