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Finding the Fourth Proportional to 128,467.35, 177,454.35 and 98,621.51

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Solution

The fourth proportional to 128,467.35, 177,454.35 and 98,621.51 is: 136,227.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,467.35 : 177,454.35 = 98,621.51 : x
  2. Step 2: Convert to fraction form
    128,467.35/177,454.35 = 98,621.51/x
  3. Step 3: Cross multiply
    128,467.35x = 177,454.35 × 98,621.51
  4. Step 4: Simplify right side
    128,467.35x = 17,500,815,065.80
  5. Step 5: Solve for x
    x = 17,500,815,065.80/128,467.35
  6. Step 6: Final answer
    x = 136,227.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.