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Finding the Fourth Proportional to 115,437.20, 172,864.20 and 92,109.20

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Solution

The fourth proportional to 115,437.20, 172,864.20 and 92,109.20 is: 137,931.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,437.20 : 172,864.20 = 92,109.20 : x
  2. Step 2: Convert to fraction form
    115,437.20/172,864.20 = 92,109.20/x
  3. Step 3: Cross multiply
    115,437.20x = 172,864.20 × 92,109.20
  4. Step 4: Simplify right side
    115,437.20x = 15,922,383,170.64
  5. Step 5: Solve for x
    x = 15,922,383,170.64/115,437.20
  6. Step 6: Final answer
    x = 137,931.13

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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.