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Finding the Fourth Proportional to 103,453.40, 154,916.58 and 68,285.72

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Solution

The fourth proportional to 103,453.40, 154,916.58 and 68,285.72 is: 102,254.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,453.40 : 154,916.58 = 68,285.72 : x
  2. Step 2: Convert to fraction form
    103,453.40/154,916.58 = 68,285.72/x
  3. Step 3: Cross multiply
    103,453.40x = 154,916.58 × 68,285.72
  4. Step 4: Simplify right side
    103,453.40x = 10,578,590,205.24
  5. Step 5: Solve for x
    x = 10,578,590,205.24/103,453.40
  6. Step 6: Final answer
    x = 102,254.64

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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.