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Finding the Fourth Proportional to 103,620.71, 155,431.05 and 68,552.16

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Solution

The fourth proportional to 103,620.71, 155,431.05 and 68,552.16 is: 102,828.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.71 : 155,431.05 = 68,552.16 : x
  2. Step 2: Convert to fraction form
    103,620.71/155,431.05 = 68,552.16/x
  3. Step 3: Cross multiply
    103,620.71x = 155,431.05 × 68,552.16
  4. Step 4: Simplify right side
    103,620.71x = 10,655,134,208.57
  5. Step 5: Solve for x
    x = 10,655,134,208.57/103,620.71
  6. Step 6: Final answer
    x = 102,828.24

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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.