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Finding the Fourth Proportional to 65,770.40, 98,655.60 and 58,512.80

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Solution

The fourth proportional to 65,770.40, 98,655.60 and 58,512.80 is: 87,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,770.40 : 98,655.60 = 58,512.80 : x
  2. Step 2: Convert to fraction form
    65,770.40/98,655.60 = 58,512.80/x
  3. Step 3: Cross multiply
    65,770.40x = 98,655.60 × 58,512.80
  4. Step 4: Simplify right side
    65,770.40x = 5,772,615,391.68
  5. Step 5: Solve for x
    x = 5,772,615,391.68/65,770.40
  6. Step 6: Final answer
    x = 87,769.20

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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.