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Finding the Fourth Proportional to 172,843.60, 259,265.40 and 155,128.90

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Solution

The fourth proportional to 172,843.60, 259,265.40 and 155,128.90 is: 232,693.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,843.60 : 259,265.40 = 155,128.90 : x
  2. Step 2: Convert to fraction form
    172,843.60/259,265.40 = 155,128.90/x
  3. Step 3: Cross multiply
    172,843.60x = 259,265.40 × 155,128.90
  4. Step 4: Simplify right side
    172,843.60x = 40,219,556,310.06
  5. Step 5: Solve for x
    x = 40,219,556,310.06/172,843.60
  6. Step 6: Final answer
    x = 232,693.35

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1.5x scale

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.