Home / 142,421.22-196,538.40-78,760.08

Finding the Fourth Proportional to 142,421.22, 196,538.40 and 78,760.08

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Solution

The fourth proportional to 142,421.22, 196,538.40 and 78,760.08 is: 108,687.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,421.22 : 196,538.40 = 78,760.08 : x
  2. Step 2: Convert to fraction form
    142,421.22/196,538.40 = 78,760.08/x
  3. Step 3: Cross multiply
    142,421.22x = 196,538.40 × 78,760.08
  4. Step 4: Simplify right side
    142,421.22x = 15,479,380,107.07
  5. Step 5: Solve for x
    x = 15,479,380,107.07/142,421.22
  6. Step 6: Final answer
    x = 108,687.32

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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.