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Finding the Fourth Proportional to 144,690.71, 199,672.29 and 81,028.35

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Solution

The fourth proportional to 144,690.71, 199,672.29 and 81,028.35 is: 111,818.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,690.71 : 199,672.29 = 81,028.35 : x
  2. Step 2: Convert to fraction form
    144,690.71/199,672.29 = 81,028.35/x
  3. Step 3: Cross multiply
    144,690.71x = 199,672.29 × 81,028.35
  4. Step 4: Simplify right side
    144,690.71x = 16,179,116,199.42
  5. Step 5: Solve for x
    x = 16,179,116,199.42/144,690.71
  6. Step 6: Final answer
    x = 111,818.63

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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.