Home / 312,513.40-468,631.86-90,914.68

Finding the Fourth Proportional to 312,513.40, 468,631.86 and 90,914.68

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Solution

The fourth proportional to 312,513.40, 468,631.86 and 90,914.68 is: 136,331.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,513.40 : 468,631.86 = 90,914.68 : x
  2. Step 2: Convert to fraction form
    312,513.40/468,631.86 = 90,914.68/x
  3. Step 3: Cross multiply
    312,513.40x = 468,631.86 × 90,914.68
  4. Step 4: Simplify right side
    312,513.40x = 42,605,515,589.70
  5. Step 5: Solve for x
    x = 42,605,515,589.70/312,513.40
  6. Step 6: Final answer
    x = 136,331.80

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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.