Home / 141,905.78-195,838.80-78,243.48

Finding the Fourth Proportional to 141,905.78, 195,838.80 and 78,243.48

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Solution

The fourth proportional to 141,905.78, 195,838.80 and 78,243.48 is: 107,980.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,905.78 : 195,838.80 = 78,243.48 : x
  2. Step 2: Convert to fraction form
    141,905.78/195,838.80 = 78,243.48/x
  3. Step 3: Cross multiply
    141,905.78x = 195,838.80 × 78,243.48
  4. Step 4: Simplify right side
    141,905.78x = 15,323,109,231.02
  5. Step 5: Solve for x
    x = 15,323,109,231.02/141,905.78
  6. Step 6: Final answer
    x = 107,980.87

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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.