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Finding the Fourth Proportional to 65,090.80, 97,668.60 and 25,649.20

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Solution

The fourth proportional to 65,090.80, 97,668.60 and 25,649.20 is: 38,486.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,090.80 : 97,668.60 = 25,649.20 : x
  2. Step 2: Convert to fraction form
    65,090.80/97,668.60 = 25,649.20/x
  3. Step 3: Cross multiply
    65,090.80x = 97,668.60 × 25,649.20
  4. Step 4: Simplify right side
    65,090.80x = 2,505,121,455.12
  5. Step 5: Solve for x
    x = 2,505,121,455.12/65,090.80
  6. Step 6: Final answer
    x = 38,486.57

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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.