Home / 138,603.06-191,272.20-78,173.58

Finding the Fourth Proportional to 138,603.06, 191,272.20 and 78,173.58

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Solution

The fourth proportional to 138,603.06, 191,272.20 and 78,173.58 is: 107,879.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,603.06 : 191,272.20 = 78,173.58 : x
  2. Step 2: Convert to fraction form
    138,603.06/191,272.20 = 78,173.58/x
  3. Step 3: Cross multiply
    138,603.06x = 191,272.20 × 78,173.58
  4. Step 4: Simplify right side
    138,603.06x = 14,952,432,628.48
  5. Step 5: Solve for x
    x = 14,952,432,628.48/138,603.06
  6. Step 6: Final answer
    x = 107,879.53

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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.