Home / 138,523,791.81-191,154,421.34-78,976,761.87

Finding the Fourth Proportional to 138,523,791.81, 191,154,421.34 and 78,976,761.87

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Solution

The fourth proportional to 138,523,791.81, 191,154,421.34 and 78,976,761.87 is: 108,983,135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,523,791.81 : 191,154,421.34 = 78,976,761.87 : x
  2. Step 2: Convert to fraction form
    138,523,791.81/191,154,421.34 = 78,976,761.87/x
  3. Step 3: Cross multiply
    138,523,791.81x = 191,154,421.34 × 78,976,761.87
  4. Step 4: Simplify right side
    138,523,791.81x = 15,096,757,214,171,944
  5. Step 5: Solve for x
    x = 15,096,757,214,171,944/138,523,791.81
  6. Step 6: Final answer
    x = 108,983,135.80

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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.