Home / 137,835.28-190,162.92-78,184.72

Finding the Fourth Proportional to 137,835.28, 190,162.92 and 78,184.72

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Solution

The fourth proportional to 137,835.28, 190,162.92 and 78,184.72 is: 107,866.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,835.28 : 190,162.92 = 78,184.72 : x
  2. Step 2: Convert to fraction form
    137,835.28/190,162.92 = 78,184.72/x
  3. Step 3: Cross multiply
    137,835.28x = 190,162.92 × 78,184.72
  4. Step 4: Simplify right side
    137,835.28x = 14,867,834,654.58
  5. Step 5: Solve for x
    x = 14,867,834,654.58/137,835.28
  6. Step 6: Final answer
    x = 107,866.68

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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.