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Finding the Fourth Proportional to 72,470.60, 108,716.70 and 25,719.56

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Solution

The fourth proportional to 72,470.60, 108,716.70 and 25,719.56 is: 38,583.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,470.60 : 108,716.70 = 25,719.56 : x
  2. Step 2: Convert to fraction form
    72,470.60/108,716.70 = 25,719.56/x
  3. Step 3: Cross multiply
    72,470.60x = 108,716.70 × 25,719.56
  4. Step 4: Simplify right side
    72,470.60x = 2,796,145,688.65
  5. Step 5: Solve for x
    x = 2,796,145,688.65/72,470.60
  6. Step 6: Final answer
    x = 38,583.17

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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.