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Finding the Fourth Proportional to 102,515.60, 153,481.80 and 90,851.60

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Solution

The fourth proportional to 102,515.60, 153,481.80 and 90,851.60 is: 136,018.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,515.60 : 153,481.80 = 90,851.60 : x
  2. Step 2: Convert to fraction form
    102,515.60/153,481.80 = 90,851.60/x
  3. Step 3: Cross multiply
    102,515.60x = 153,481.80 × 90,851.60
  4. Step 4: Simplify right side
    102,515.60x = 13,944,067,100.88
  5. Step 5: Solve for x
    x = 13,944,067,100.88/102,515.60
  6. Step 6: Final answer
    x = 136,018.98

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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.