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Finding the Fourth Proportional to 80,428.40, 110,989.68 and 44,130

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Solution

The fourth proportional to 80,428.40, 110,989.68 and 44,130 is: 60,898.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,428.40 : 110,989.68 = 44,130 : x
  2. Step 2: Convert to fraction form
    80,428.40/110,989.68 = 44,130/x
  3. Step 3: Cross multiply
    80,428.40x = 110,989.68 × 44,130
  4. Step 4: Simplify right side
    80,428.40x = 4,897,974,578.40
  5. Step 5: Solve for x
    x = 4,897,974,578.40/80,428.40
  6. Step 6: Final answer
    x = 60,898.57

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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.