Home / 73,159.20-109,738.80-28,787.40

Finding the Fourth Proportional to 73,159.20, 109,738.80 and 28,787.40

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Solution

The fourth proportional to 73,159.20, 109,738.80 and 28,787.40 is: 43,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,159.20 : 109,738.80 = 28,787.40 : x
  2. Step 2: Convert to fraction form
    73,159.20/109,738.80 = 28,787.40/x
  3. Step 3: Cross multiply
    73,159.20x = 109,738.80 × 28,787.40
  4. Step 4: Simplify right side
    73,159.20x = 3,159,094,731.12
  5. Step 5: Solve for x
    x = 3,159,094,731.12/73,159.20
  6. Step 6: Final answer
    x = 43,181.10

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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.