Home / 141,871.20-195,783.64-78,211.28

Finding the Fourth Proportional to 141,871.20, 195,783.64 and 78,211.28

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Solution

The fourth proportional to 141,871.20, 195,783.64 and 78,211.28 is: 107,932.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,871.20 : 195,783.64 = 78,211.28 : x
  2. Step 2: Convert to fraction form
    141,871.20/195,783.64 = 78,211.28/x
  3. Step 3: Cross multiply
    141,871.20x = 195,783.64 × 78,211.28
  4. Step 4: Simplify right side
    141,871.20x = 15,312,489,087.46
  5. Step 5: Solve for x
    x = 15,312,489,087.46/141,871.20
  6. Step 6: Final answer
    x = 107,932.33

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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.