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Finding the Fourth Proportional to 118,471.79, 177,716.87 and 39,586.30

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Solution

The fourth proportional to 118,471.79, 177,716.87 and 39,586.30 is: 59,382.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,471.79 : 177,716.87 = 39,586.30 : x
  2. Step 2: Convert to fraction form
    118,471.79/177,716.87 = 39,586.30/x
  3. Step 3: Cross multiply
    118,471.79x = 177,716.87 × 39,586.30
  4. Step 4: Simplify right side
    118,471.79x = 7,035,152,837.11
  5. Step 5: Solve for x
    x = 7,035,152,837.11/118,471.79
  6. Step 6: Final answer
    x = 59,382.51

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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.