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Finding the Fourth Proportional to 61,889.67, 85,421.79 and 39,259.89

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Solution

The fourth proportional to 61,889.67, 85,421.79 and 39,259.89 is: 54,187.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,889.67 : 85,421.79 = 39,259.89 : x
  2. Step 2: Convert to fraction form
    61,889.67/85,421.79 = 39,259.89/x
  3. Step 3: Cross multiply
    61,889.67x = 85,421.79 × 39,259.89
  4. Step 4: Simplify right side
    61,889.67x = 3,353,650,079.00
  5. Step 5: Solve for x
    x = 3,353,650,079.00/61,889.67
  6. Step 6: Final answer
    x = 54,187.56

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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.