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Finding the Fourth Proportional to 69,411.87, 95,782.59 and 40,728.60

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Solution

The fourth proportional to 69,411.87, 95,782.59 and 40,728.60 is: 56,202.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,411.87 : 95,782.59 = 40,728.60 : x
  2. Step 2: Convert to fraction form
    69,411.87/95,782.59 = 40,728.60/x
  3. Step 3: Cross multiply
    69,411.87x = 95,782.59 × 40,728.60
  4. Step 4: Simplify right side
    69,411.87x = 3,901,090,795.07
  5. Step 5: Solve for x
    x = 3,901,090,795.07/69,411.87
  6. Step 6: Final answer
    x = 56,202.07

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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.