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Finding the Fourth Proportional to 118,712.20, 177,722.70 and 115,256.20

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Solution

The fourth proportional to 118,712.20, 177,722.70 and 115,256.20 is: 172,548.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,712.20 : 177,722.70 = 115,256.20 : x
  2. Step 2: Convert to fraction form
    118,712.20/177,722.70 = 115,256.20/x
  3. Step 3: Cross multiply
    118,712.20x = 177,722.70 × 115,256.20
  4. Step 4: Simplify right side
    118,712.20x = 20,483,643,055.74
  5. Step 5: Solve for x
    x = 20,483,643,055.74/118,712.20
  6. Step 6: Final answer
    x = 172,548.76

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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.