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Finding the Fourth Proportional to 115,234.70, 172,852.05 and 91,906.70

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Solution

The fourth proportional to 115,234.70, 172,852.05 and 91,906.70 is: 137,860.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,234.70 : 172,852.05 = 91,906.70 : x
  2. Step 2: Convert to fraction form
    115,234.70/172,852.05 = 91,906.70/x
  3. Step 3: Cross multiply
    115,234.70x = 172,852.05 × 91,906.70
  4. Step 4: Simplify right side
    115,234.70x = 15,886,261,503.74
  5. Step 5: Solve for x
    x = 15,886,261,503.74/115,234.70
  6. Step 6: Final answer
    x = 137,860.05

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1.5x scale

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.