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Finding the Fourth Proportional to 65,739.60, 98,555.40 and 28,328.40

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Solution

The fourth proportional to 65,739.60, 98,555.40 and 28,328.40 is: 42,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,739.60 : 98,555.40 = 28,328.40 : x
  2. Step 2: Convert to fraction form
    65,739.60/98,555.40 = 28,328.40/x
  3. Step 3: Cross multiply
    65,739.60x = 98,555.40 × 28,328.40
  4. Step 4: Simplify right side
    65,739.60x = 2,791,916,793.36
  5. Step 5: Solve for x
    x = 2,791,916,793.36/65,739.60
  6. Step 6: Final answer
    x = 42,469.33

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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.