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Finding the Fourth Proportional to 185,983.64, 278,994.96 and 79,378.94

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Solution

The fourth proportional to 185,983.64, 278,994.96 and 79,378.94 is: 119,076.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,983.64 : 278,994.96 = 79,378.94 : x
  2. Step 2: Convert to fraction form
    185,983.64/278,994.96 = 79,378.94/x
  3. Step 3: Cross multiply
    185,983.64x = 278,994.96 × 79,378.94
  4. Step 4: Simplify right side
    185,983.64x = 22,146,323,095.03
  5. Step 5: Solve for x
    x = 22,146,323,095.03/185,983.64
  6. Step 6: Final answer
    x = 119,076.72

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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.