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Finding the Fourth Proportional to 103,350.60, 155,025.90 and 90,228.60

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Solution

The fourth proportional to 103,350.60, 155,025.90 and 90,228.60 is: 135,342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,350.60 : 155,025.90 = 90,228.60 : x
  2. Step 2: Convert to fraction form
    103,350.60/155,025.90 = 90,228.60/x
  3. Step 3: Cross multiply
    103,350.60x = 155,025.90 × 90,228.60
  4. Step 4: Simplify right side
    103,350.60x = 13,987,769,920.74
  5. Step 5: Solve for x
    x = 13,987,769,920.74/103,350.60
  6. Step 6: Final answer
    x = 135,342.90

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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.