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Finding the Fourth Proportional to 121,087.20, 181,630.80 and 61,903.20

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Solution

The fourth proportional to 121,087.20, 181,630.80 and 61,903.20 is: 92,854.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,087.20 : 181,630.80 = 61,903.20 : x
  2. Step 2: Convert to fraction form
    121,087.20/181,630.80 = 61,903.20/x
  3. Step 3: Cross multiply
    121,087.20x = 181,630.80 × 61,903.20
  4. Step 4: Simplify right side
    121,087.20x = 11,243,527,738.56
  5. Step 5: Solve for x
    x = 11,243,527,738.56/121,087.20
  6. Step 6: Final answer
    x = 92,854.80

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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.