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Finding the Fourth Proportional to 144,703.13, 199,690.36 and 81,040.93

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Solution

The fourth proportional to 144,703.13, 199,690.36 and 81,040.93 is: 111,836.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,703.13 : 199,690.36 = 81,040.93 : x
  2. Step 2: Convert to fraction form
    144,703.13/199,690.36 = 81,040.93/x
  3. Step 3: Cross multiply
    144,703.13x = 199,690.36 × 81,040.93
  4. Step 4: Simplify right side
    144,703.13x = 16,183,091,784.61
  5. Step 5: Solve for x
    x = 16,183,091,784.61/144,703.13
  6. Step 6: Final answer
    x = 111,836.51

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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.