Home / 141,801.78-195,690.65-78,143.70

Finding the Fourth Proportional to 141,801.78, 195,690.65 and 78,143.70

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Solution

The fourth proportional to 141,801.78, 195,690.65 and 78,143.70 is: 107,840.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,801.78 : 195,690.65 = 78,143.70 : x
  2. Step 2: Convert to fraction form
    141,801.78/195,690.65 = 78,143.70/x
  3. Step 3: Cross multiply
    141,801.78x = 195,690.65 × 78,143.70
  4. Step 4: Simplify right side
    141,801.78x = 15,291,991,055.69
  5. Step 5: Solve for x
    x = 15,291,991,055.69/141,801.78
  6. Step 6: Final answer
    x = 107,840.61

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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.