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Finding the Fourth Proportional to 85,597.92, 128,521.49 and 60,769.80

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Solution

The fourth proportional to 85,597.92, 128,521.49 and 60,769.80 is: 91,243.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,597.92 : 128,521.49 = 60,769.80 : x
  2. Step 2: Convert to fraction form
    85,597.92/128,521.49 = 60,769.80/x
  3. Step 3: Cross multiply
    85,597.92x = 128,521.49 × 60,769.80
  4. Step 4: Simplify right side
    85,597.92x = 7,810,224,939.15
  5. Step 5: Solve for x
    x = 7,810,224,939.15/85,597.92
  6. Step 6: Final answer
    x = 91,243.16

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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.