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Finding the Fourth Proportional to 65,910.30, 98,865.45 and 28,512.60

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Solution

The fourth proportional to 65,910.30, 98,865.45 and 28,512.60 is: 42,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,910.30 : 98,865.45 = 28,512.60 : x
  2. Step 2: Convert to fraction form
    65,910.30/98,865.45 = 28,512.60/x
  3. Step 3: Cross multiply
    65,910.30x = 98,865.45 × 28,512.60
  4. Step 4: Simplify right side
    65,910.30x = 2,818,911,029.67
  5. Step 5: Solve for x
    x = 2,818,911,029.67/65,910.30
  6. Step 6: Final answer
    x = 42,768.90

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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.