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Finding the Fourth Proportional to 121,208.70, 181,812.83 and 54,570.96

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Solution

The fourth proportional to 121,208.70, 181,812.83 and 54,570.96 is: 81,856.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,208.70 : 181,812.83 = 54,570.96 : x
  2. Step 2: Convert to fraction form
    121,208.70/181,812.83 = 54,570.96/x
  3. Step 3: Cross multiply
    121,208.70x = 181,812.83 × 54,570.96
  4. Step 4: Simplify right side
    121,208.70x = 9,921,700,400.56
  5. Step 5: Solve for x
    x = 9,921,700,400.56/121,208.70
  6. Step 6: Final answer
    x = 81,856.34

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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.