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Finding the Fourth Proportional to 144,164.13, 198,945.70 and 79,637.81

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Solution

The fourth proportional to 144,164.13, 198,945.70 and 79,637.81 is: 109,899.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,164.13 : 198,945.70 = 79,637.81 : x
  2. Step 2: Convert to fraction form
    144,164.13/198,945.70 = 79,637.81/x
  3. Step 3: Cross multiply
    144,164.13x = 198,945.70 × 79,637.81
  4. Step 4: Simplify right side
    144,164.13x = 15,843,599,111.06
  5. Step 5: Solve for x
    x = 15,843,599,111.06/144,164.13
  6. Step 6: Final answer
    x = 109,899.73

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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.