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Finding the Fourth Proportional to 103,620.30, 155,353.65 and 70,257.10

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Solution

The fourth proportional to 103,620.30, 155,353.65 and 70,257.10 is: 105,333.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.30 : 155,353.65 = 70,257.10 : x
  2. Step 2: Convert to fraction form
    103,620.30/155,353.65 = 70,257.10/x
  3. Step 3: Cross multiply
    103,620.30x = 155,353.65 × 70,257.10
  4. Step 4: Simplify right side
    103,620.30x = 10,914,696,923.42
  5. Step 5: Solve for x
    x = 10,914,696,923.42/103,620.30
  6. Step 6: Final answer
    x = 105,333.58

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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.