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Finding the Fourth Proportional to 58,808.25, 81,222.21 and 39,912.57

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Solution

The fourth proportional to 58,808.25, 81,222.21 and 39,912.57 is: 55,124.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,808.25 : 81,222.21 = 39,912.57 : x
  2. Step 2: Convert to fraction form
    58,808.25/81,222.21 = 39,912.57/x
  3. Step 3: Cross multiply
    58,808.25x = 81,222.21 × 39,912.57
  4. Step 4: Simplify right side
    58,808.25x = 3,241,787,142.18
  5. Step 5: Solve for x
    x = 3,241,787,142.18/58,808.25
  6. Step 6: Final answer
    x = 55,124.70

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1.5x scale

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.