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Finding the Fourth Proportional to 61,125.89, 91,697.39 and 57,764.39

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Solution

The fourth proportional to 61,125.89, 91,697.39 and 57,764.39 is: 86,654.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,125.89 : 91,697.39 = 57,764.39 : x
  2. Step 2: Convert to fraction form
    61,125.89/91,697.39 = 57,764.39/x
  3. Step 3: Cross multiply
    61,125.89x = 91,697.39 × 57,764.39
  4. Step 4: Simplify right side
    61,125.89x = 5,296,843,945.51
  5. Step 5: Solve for x
    x = 5,296,843,945.51/61,125.89
  6. Step 6: Final answer
    x = 86,654.67

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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.