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Finding the Fourth Proportional to 98,990.48, 136,606.44 and 54,278.48

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Solution

The fourth proportional to 98,990.48, 136,606.44 and 54,278.48 is: 74,904.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,990.48 : 136,606.44 = 54,278.48 : x
  2. Step 2: Convert to fraction form
    98,990.48/136,606.44 = 54,278.48/x
  3. Step 3: Cross multiply
    98,990.48x = 136,606.44 × 54,278.48
  4. Step 4: Simplify right side
    98,990.48x = 7,414,789,921.41
  5. Step 5: Solve for x
    x = 7,414,789,921.41/98,990.48
  6. Step 6: Final answer
    x = 74,904.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.