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Finding the Fourth Proportional to 115,183.96, 172,385.70 and 70,838.80

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Solution

The fourth proportional to 115,183.96, 172,385.70 and 70,838.80 is: 106,018.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,183.96 : 172,385.70 = 70,838.80 : x
  2. Step 2: Convert to fraction form
    115,183.96/172,385.70 = 70,838.80/x
  3. Step 3: Cross multiply
    115,183.96x = 172,385.70 × 70,838.80
  4. Step 4: Simplify right side
    115,183.96x = 12,211,596,125.16
  5. Step 5: Solve for x
    x = 12,211,596,125.16/115,183.96
  6. Step 6: Final answer
    x = 106,018.20

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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.