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Finding the Fourth Proportional to 104,791.63, 144,292.20 and 78,987.67

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Solution

The fourth proportional to 104,791.63, 144,292.20 and 78,987.67 is: 108,761.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,791.63 : 144,292.20 = 78,987.67 : x
  2. Step 2: Convert to fraction form
    104,791.63/144,292.20 = 78,987.67/x
  3. Step 3: Cross multiply
    104,791.63x = 144,292.20 × 78,987.67
  4. Step 4: Simplify right side
    104,791.63x = 11,397,304,677.17
  5. Step 5: Solve for x
    x = 11,397,304,677.17/104,791.63
  6. Step 6: Final answer
    x = 108,761.59

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1.5x scale

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.