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Finding the Fourth Proportional to 117,303.60, 175,770.80 and 90,714.72

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Solution

The fourth proportional to 117,303.60, 175,770.80 and 90,714.72 is: 135,929.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,303.60 : 175,770.80 = 90,714.72 : x
  2. Step 2: Convert to fraction form
    117,303.60/175,770.80 = 90,714.72/x
  3. Step 3: Cross multiply
    117,303.60x = 175,770.80 × 90,714.72
  4. Step 4: Simplify right side
    117,303.60x = 15,944,998,906.18
  5. Step 5: Solve for x
    x = 15,944,998,906.18/117,303.60
  6. Step 6: Final answer
    x = 135,929.32

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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.