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Finding the Fourth Proportional to 103,309.40, 154,704.90 and 68,058.20

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Solution

The fourth proportional to 103,309.40, 154,704.90 and 68,058.20 is: 101,916.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,309.40 : 154,704.90 = 68,058.20 : x
  2. Step 2: Convert to fraction form
    103,309.40/154,704.90 = 68,058.20/x
  3. Step 3: Cross multiply
    103,309.40x = 154,704.90 × 68,058.20
  4. Step 4: Simplify right side
    103,309.40x = 10,528,937,025.18
  5. Step 5: Solve for x
    x = 10,528,937,025.18/103,309.40
  6. Step 6: Final answer
    x = 101,916.54

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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.