Home / 138,723.34-191,438.87-78,296.53

Finding the Fourth Proportional to 138,723.34, 191,438.87 and 78,296.53

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Solution

The fourth proportional to 138,723.34, 191,438.87 and 78,296.53 is: 108,049.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,723.34 : 191,438.87 = 78,296.53 : x
  2. Step 2: Convert to fraction form
    138,723.34/191,438.87 = 78,296.53/x
  3. Step 3: Cross multiply
    138,723.34x = 191,438.87 × 78,296.53
  4. Step 4: Simplify right side
    138,723.34x = 14,988,999,228.12
  5. Step 5: Solve for x
    x = 14,988,999,228.12/138,723.34
  6. Step 6: Final answer
    x = 108,049.58

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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.