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Finding the Fourth Proportional to 312,063.50, 468,173.02 and 90,447.50

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Solution

The fourth proportional to 312,063.50, 468,173.02 and 90,447.50 is: 135,693.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,063.50 : 468,173.02 = 90,447.50 : x
  2. Step 2: Convert to fraction form
    312,063.50/468,173.02 = 90,447.50/x
  3. Step 3: Cross multiply
    312,063.50x = 468,173.02 × 90,447.50
  4. Step 4: Simplify right side
    312,063.50x = 42,345,079,226.45
  5. Step 5: Solve for x
    x = 42,345,079,226.45/312,063.50
  6. Step 6: Final answer
    x = 135,693.79

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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.