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Finding the Fourth Proportional to 128,010.60, 192,015.90 and 88,644.60

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Solution

The fourth proportional to 128,010.60, 192,015.90 and 88,644.60 is: 132,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,010.60 : 192,015.90 = 88,644.60 : x
  2. Step 2: Convert to fraction form
    128,010.60/192,015.90 = 88,644.60/x
  3. Step 3: Cross multiply
    128,010.60x = 192,015.90 × 88,644.60
  4. Step 4: Simplify right side
    128,010.60x = 17,021,172,649.14
  5. Step 5: Solve for x
    x = 17,021,172,649.14/128,010.60
  6. Step 6: Final answer
    x = 132,966.90

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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.