Home / 138,632.76-191,315.43-78,204.60

Finding the Fourth Proportional to 138,632.76, 191,315.43 and 78,204.60

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Solution

The fourth proportional to 138,632.76, 191,315.43 and 78,204.60 is: 107,923.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,632.76 : 191,315.43 = 78,204.60 : x
  2. Step 2: Convert to fraction form
    138,632.76/191,315.43 = 78,204.60/x
  3. Step 3: Cross multiply
    138,632.76x = 191,315.43 × 78,204.60
  4. Step 4: Simplify right side
    138,632.76x = 14,961,746,676.98
  5. Step 5: Solve for x
    x = 14,961,746,676.98/138,632.76
  6. Step 6: Final answer
    x = 107,923.60

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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.