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Finding the Fourth Proportional to 65,751.90, 98,591.40 and 28,305.60

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Solution

The fourth proportional to 65,751.90, 98,591.40 and 28,305.60 is: 42,442.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,751.90 : 98,591.40 = 28,305.60 : x
  2. Step 2: Convert to fraction form
    65,751.90/98,591.40 = 28,305.60/x
  3. Step 3: Cross multiply
    65,751.90x = 98,591.40 × 28,305.60
  4. Step 4: Simplify right side
    65,751.90x = 2,790,688,731.84
  5. Step 5: Solve for x
    x = 2,790,688,731.84/65,751.90
  6. Step 6: Final answer
    x = 42,442.71

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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.