Home / 142,789.30-197,051.78-78,254.24

Finding the Fourth Proportional to 142,789.30, 197,051.78 and 78,254.24

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Solution

The fourth proportional to 142,789.30, 197,051.78 and 78,254.24 is: 107,992.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,789.30 : 197,051.78 = 78,254.24 : x
  2. Step 2: Convert to fraction form
    142,789.30/197,051.78 = 78,254.24/x
  3. Step 3: Cross multiply
    142,789.30x = 197,051.78 × 78,254.24
  4. Step 4: Simplify right side
    142,789.30x = 15,420,137,284.55
  5. Step 5: Solve for x
    x = 15,420,137,284.55/142,789.30
  6. Step 6: Final answer
    x = 107,992.25

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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.