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Finding the Fourth Proportional to 118,484.48, 177,530.70 and 71,640.56

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Solution

The fourth proportional to 118,484.48, 177,530.70 and 71,640.56 is: 107,342.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,484.48 : 177,530.70 = 71,640.56 : x
  2. Step 2: Convert to fraction form
    118,484.48/177,530.70 = 71,640.56/x
  3. Step 3: Cross multiply
    118,484.48x = 177,530.70 × 71,640.56
  4. Step 4: Simplify right side
    118,484.48x = 12,718,398,765.19
  5. Step 5: Solve for x
    x = 12,718,398,765.19/118,484.48
  6. Step 6: Final answer
    x = 107,342.32

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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.