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Finding the Fourth Proportional to 141,963.93, 195,909.30 and 78,300.36

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Solution

The fourth proportional to 141,963.93, 195,909.30 and 78,300.36 is: 108,053.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,963.93 : 195,909.30 = 78,300.36 : x
  2. Step 2: Convert to fraction form
    141,963.93/195,909.30 = 78,300.36/x
  3. Step 3: Cross multiply
    141,963.93x = 195,909.30 × 78,300.36
  4. Step 4: Simplify right side
    141,963.93x = 15,339,768,717.35
  5. Step 5: Solve for x
    x = 15,339,768,717.35/141,963.93
  6. Step 6: Final answer
    x = 108,053.99

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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.