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Finding the Fourth Proportional to 65,612.80, 98,433.60 and 21,241.60

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Solution

The fourth proportional to 65,612.80, 98,433.60 and 21,241.60 is: 31,867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,612.80 : 98,433.60 = 21,241.60 : x
  2. Step 2: Convert to fraction form
    65,612.80/98,433.60 = 21,241.60/x
  3. Step 3: Cross multiply
    65,612.80x = 98,433.60 × 21,241.60
  4. Step 4: Simplify right side
    65,612.80x = 2,090,887,157.76
  5. Step 5: Solve for x
    x = 2,090,887,157.76/65,612.80
  6. Step 6: Final answer
    x = 31,867.06

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1.5x scale

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.