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Finding the Fourth Proportional to 115,134.57, 172,741.07 and 70,245.79

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Solution

The fourth proportional to 115,134.57, 172,741.07 and 70,245.79 is: 105,392.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,134.57 : 172,741.07 = 70,245.79 : x
  2. Step 2: Convert to fraction form
    115,134.57/172,741.07 = 70,245.79/x
  3. Step 3: Cross multiply
    115,134.57x = 172,741.07 × 70,245.79
  4. Step 4: Simplify right side
    115,134.57x = 12,134,332,927.60
  5. Step 5: Solve for x
    x = 12,134,332,927.60/115,134.57
  6. Step 6: Final answer
    x = 105,392.61

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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.