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Finding the Fourth Proportional to 64,531.60, 96,720.60 and 27,091.60

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Solution

The fourth proportional to 64,531.60, 96,720.60 and 27,091.60 is: 40,605.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,531.60 : 96,720.60 = 27,091.60 : x
  2. Step 2: Convert to fraction form
    64,531.60/96,720.60 = 27,091.60/x
  3. Step 3: Cross multiply
    64,531.60x = 96,720.60 × 27,091.60
  4. Step 4: Simplify right side
    64,531.60x = 2,620,315,806.96
  5. Step 5: Solve for x
    x = 2,620,315,806.96/64,531.60
  6. Step 6: Final answer
    x = 40,605.16

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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.