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Finding the Fourth Proportional to 65,487.74, 98,149.37 and 28,003.78

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Solution

The fourth proportional to 65,487.74, 98,149.37 and 28,003.78 is: 41,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,487.74 : 98,149.37 = 28,003.78 : x
  2. Step 2: Convert to fraction form
    65,487.74/98,149.37 = 28,003.78/x
  3. Step 3: Cross multiply
    65,487.74x = 98,149.37 × 28,003.78
  4. Step 4: Simplify right side
    65,487.74x = 2,748,553,364.62
  5. Step 5: Solve for x
    x = 2,748,553,364.62/65,487.74
  6. Step 6: Final answer
    x = 41,970.50

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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.