Home / 142,654.02-196,865.64-78,126

Finding the Fourth Proportional to 142,654.02, 196,865.64 and 78,126

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Solution

The fourth proportional to 142,654.02, 196,865.64 and 78,126 is: 107,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,654.02 : 196,865.64 = 78,126 : x
  2. Step 2: Convert to fraction form
    142,654.02/196,865.64 = 78,126/x
  3. Step 3: Cross multiply
    142,654.02x = 196,865.64 × 78,126
  4. Step 4: Simplify right side
    142,654.02x = 15,380,324,990.64
  5. Step 5: Solve for x
    x = 15,380,324,990.64/142,654.02
  6. Step 6: Final answer
    x = 107,815.57

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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.