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Finding the Fourth Proportional to 144,728.93, 199,720.14 and 81,063.47

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Solution

The fourth proportional to 144,728.93, 199,720.14 and 81,063.47 is: 111,864.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,728.93 : 199,720.14 = 81,063.47 : x
  2. Step 2: Convert to fraction form
    144,728.93/199,720.14 = 81,063.47/x
  3. Step 3: Cross multiply
    144,728.93x = 199,720.14 × 81,063.47
  4. Step 4: Simplify right side
    144,728.93x = 16,190,007,577.29
  5. Step 5: Solve for x
    x = 16,190,007,577.29/144,728.93
  6. Step 6: Final answer
    x = 111,864.35

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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.