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Finding the Fourth Proportional to 61,650, 85,090.59 and 40,102.20

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Solution

The fourth proportional to 61,650, 85,090.59 and 40,102.20 is: 55,349.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,650 : 85,090.59 = 40,102.20 : x
  2. Step 2: Convert to fraction form
    61,650/85,090.59 = 40,102.20/x
  3. Step 3: Cross multiply
    61,650x = 85,090.59 × 40,102.20
  4. Step 4: Simplify right side
    61,650x = 3,412,319,858.30
  5. Step 5: Solve for x
    x = 3,412,319,858.30/61,650
  6. Step 6: Final answer
    x = 55,349.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.