Home / 138,318.92-190,878.23-77,890.29

Finding the Fourth Proportional to 138,318.92, 190,878.23 and 77,890.29

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Solution

The fourth proportional to 138,318.92, 190,878.23 and 77,890.29 is: 107,487.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,318.92 : 190,878.23 = 77,890.29 : x
  2. Step 2: Convert to fraction form
    138,318.92/190,878.23 = 77,890.29/x
  3. Step 3: Cross multiply
    138,318.92x = 190,878.23 × 77,890.29
  4. Step 4: Simplify right side
    138,318.92x = 14,867,560,689.39
  5. Step 5: Solve for x
    x = 14,867,560,689.39/138,318.92
  6. Step 6: Final answer
    x = 107,487.54

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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.