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Finding the Fourth Proportional to 312,445.75, 468,748.55 and 90,829.75

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Solution

The fourth proportional to 312,445.75, 468,748.55 and 90,829.75 is: 136,267.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,445.75 : 468,748.55 = 90,829.75 : x
  2. Step 2: Convert to fraction form
    312,445.75/468,748.55 = 90,829.75/x
  3. Step 3: Cross multiply
    312,445.75x = 468,748.55 × 90,829.75
  4. Step 4: Simplify right side
    312,445.75x = 42,576,313,155.21
  5. Step 5: Solve for x
    x = 42,576,313,155.21/312,445.75
  6. Step 6: Final answer
    x = 136,267.86

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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.