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Finding the Fourth Proportional to 107,916.40, 161,701.80 and 68,402.80

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Solution

The fourth proportional to 107,916.40, 161,701.80 and 68,402.80 is: 102,494.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,916.40 : 161,701.80 = 68,402.80 : x
  2. Step 2: Convert to fraction form
    107,916.40/161,701.80 = 68,402.80/x
  3. Step 3: Cross multiply
    107,916.40x = 161,701.80 × 68,402.80
  4. Step 4: Simplify right side
    107,916.40x = 11,060,855,885.04
  5. Step 5: Solve for x
    x = 11,060,855,885.04/107,916.40
  6. Step 6: Final answer
    x = 102,494.67

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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.