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Finding the Fourth Proportional to 103,181.71, 154,772.55 and 68,113.16

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Solution

The fourth proportional to 103,181.71, 154,772.55 and 68,113.16 is: 102,169.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,181.71 : 154,772.55 = 68,113.16 : x
  2. Step 2: Convert to fraction form
    103,181.71/154,772.55 = 68,113.16/x
  3. Step 3: Cross multiply
    103,181.71x = 154,772.55 × 68,113.16
  4. Step 4: Simplify right side
    103,181.71x = 10,542,047,461.76
  5. Step 5: Solve for x
    x = 10,542,047,461.76/103,181.71
  6. Step 6: Final answer
    x = 102,169.74

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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.