Home / 142,520.77-196,682.75-78,864.49

Finding the Fourth Proportional to 142,520.77, 196,682.75 and 78,864.49

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Solution

The fourth proportional to 142,520.77, 196,682.75 and 78,864.49 is: 108,835.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,520.77 : 196,682.75 = 78,864.49 : x
  2. Step 2: Convert to fraction form
    142,520.77/196,682.75 = 78,864.49/x
  3. Step 3: Cross multiply
    142,520.77x = 196,682.75 × 78,864.49
  4. Step 4: Simplify right side
    142,520.77x = 15,511,284,770.55
  5. Step 5: Solve for x
    x = 15,511,284,770.55/142,520.77
  6. Step 6: Final answer
    x = 108,835.26

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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.