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Finding the Fourth Proportional to 144,920.88, 199,988.28 and 81,258.48

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Solution

The fourth proportional to 144,920.88, 199,988.28 and 81,258.48 is: 112,135.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,920.88 : 199,988.28 = 81,258.48 : x
  2. Step 2: Convert to fraction form
    144,920.88/199,988.28 = 81,258.48/x
  3. Step 3: Cross multiply
    144,920.88x = 199,988.28 × 81,258.48
  4. Step 4: Simplify right side
    144,920.88x = 16,250,743,650.61
  5. Step 5: Solve for x
    x = 16,250,743,650.61/144,920.88
  6. Step 6: Final answer
    x = 112,135.28

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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.