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Finding the Fourth Proportional to 103,636.85, 155,364.15 and 70,248.65

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Solution

The fourth proportional to 103,636.85, 155,364.15 and 70,248.65 is: 105,311.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.85 : 155,364.15 = 70,248.65 : x
  2. Step 2: Convert to fraction form
    103,636.85/155,364.15 = 70,248.65/x
  3. Step 3: Cross multiply
    103,636.85x = 155,364.15 × 70,248.65
  4. Step 4: Simplify right side
    103,636.85x = 10,914,121,795.90
  5. Step 5: Solve for x
    x = 10,914,121,795.90/103,636.85
  6. Step 6: Final answer
    x = 105,311.21

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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.