Home / 138,650.03-191,320.58-78,217.14

Finding the Fourth Proportional to 138,650.03, 191,320.58 and 78,217.14

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Solution

The fourth proportional to 138,650.03, 191,320.58 and 78,217.14 is: 107,930.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,650.03 : 191,320.58 = 78,217.14 : x
  2. Step 2: Convert to fraction form
    138,650.03/191,320.58 = 78,217.14/x
  3. Step 3: Cross multiply
    138,650.03x = 191,320.58 × 78,217.14
  4. Step 4: Simplify right side
    138,650.03x = 14,964,549,503.74
  5. Step 5: Solve for x
    x = 14,964,549,503.74/138,650.03
  6. Step 6: Final answer
    x = 107,930.37

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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.