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Finding the Fourth Proportional to 58,818.40, 81,170.12 and 31,961.40

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Solution

The fourth proportional to 58,818.40, 81,170.12 and 31,961.40 is: 44,107.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,818.40 : 81,170.12 = 31,961.40 : x
  2. Step 2: Convert to fraction form
    58,818.40/81,170.12 = 31,961.40/x
  3. Step 3: Cross multiply
    58,818.40x = 81,170.12 × 31,961.40
  4. Step 4: Simplify right side
    58,818.40x = 2,594,310,673.37
  5. Step 5: Solve for x
    x = 2,594,310,673.37/58,818.40
  6. Step 6: Final answer
    x = 44,107.13

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.