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Finding the Fourth Proportional to 90,772.72, 136,065.48 and 65,749.84

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Solution

The fourth proportional to 90,772.72, 136,065.48 and 65,749.84 is: 98,556.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,772.72 : 136,065.48 = 65,749.84 : x
  2. Step 2: Convert to fraction form
    90,772.72/136,065.48 = 65,749.84/x
  3. Step 3: Cross multiply
    90,772.72x = 136,065.48 × 65,749.84
  4. Step 4: Simplify right side
    90,772.72x = 8,946,283,539.52
  5. Step 5: Solve for x
    x = 8,946,283,539.52/90,772.72
  6. Step 6: Final answer
    x = 98,556.96

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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.