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Finding the Fourth Proportional to 130,791.91, 180,498.77 and 77,079.19

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Solution

The fourth proportional to 130,791.91, 180,498.77 and 77,079.19 is: 106,372.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,791.91 : 180,498.77 = 77,079.19 : x
  2. Step 2: Convert to fraction form
    130,791.91/180,498.77 = 77,079.19/x
  3. Step 3: Cross multiply
    130,791.91x = 180,498.77 × 77,079.19
  4. Step 4: Simplify right side
    130,791.91x = 13,912,698,987.60
  5. Step 5: Solve for x
    x = 13,912,698,987.60/130,791.91
  6. Step 6: Final answer
    x = 106,372.78

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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.