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Finding the Fourth Proportional to 155,113.60, 232,843.20 and 85,129.60

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Solution

The fourth proportional to 155,113.60, 232,843.20 and 85,129.60 is: 127,789.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,113.60 : 232,843.20 = 85,129.60 : x
  2. Step 2: Convert to fraction form
    155,113.60/232,843.20 = 85,129.60/x
  3. Step 3: Cross multiply
    155,113.60x = 232,843.20 × 85,129.60
  4. Step 4: Simplify right side
    155,113.60x = 19,821,848,478.72
  5. Step 5: Solve for x
    x = 19,821,848,478.72/155,113.60
  6. Step 6: Final answer
    x = 127,789.24

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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.