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Finding the Fourth Proportional to 103,632.60, 155,448.90 and 71,975.78

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Solution

The fourth proportional to 103,632.60, 155,448.90 and 71,975.78 is: 107,963.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,632.60 : 155,448.90 = 71,975.78 : x
  2. Step 2: Convert to fraction form
    103,632.60/155,448.90 = 71,975.78/x
  3. Step 3: Cross multiply
    103,632.60x = 155,448.90 × 71,975.78
  4. Step 4: Simplify right side
    103,632.60x = 11,188,555,050.40
  5. Step 5: Solve for x
    x = 11,188,555,050.40/103,632.60
  6. Step 6: Final answer
    x = 107,963.66

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1.5x scale

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.