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Finding the Fourth Proportional to 387,911.81, 581,889.58 and 118,048.73

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Solution

The fourth proportional to 387,911.81, 581,889.58 and 118,048.73 is: 177,079.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,911.81 : 581,889.58 = 118,048.73 : x
  2. Step 2: Convert to fraction form
    387,911.81/581,889.58 = 118,048.73/x
  3. Step 3: Cross multiply
    387,911.81x = 581,889.58 × 118,048.73
  4. Step 4: Simplify right side
    387,911.81x = 68,691,322,419.54
  5. Step 5: Solve for x
    x = 68,691,322,419.54/387,911.81
  6. Step 6: Final answer
    x = 177,079.74

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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.