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Finding the Fourth Proportional to 124,601.70, 186,902.55 and 121,321.20

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Solution

The fourth proportional to 124,601.70, 186,902.55 and 121,321.20 is: 181,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,601.70 : 186,902.55 = 121,321.20 : x
  2. Step 2: Convert to fraction form
    124,601.70/186,902.55 = 121,321.20/x
  3. Step 3: Cross multiply
    124,601.70x = 186,902.55 × 121,321.20
  4. Step 4: Simplify right side
    124,601.70x = 22,675,241,649.06
  5. Step 5: Solve for x
    x = 22,675,241,649.06/124,601.70
  6. Step 6: Final answer
    x = 181,981.80

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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.