Home / 138,508,910-191,125,784.52-76,620,866.48

Finding the Fourth Proportional to 138,508,910, 191,125,784.52 and 76,620,866.48

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Solution

The fourth proportional to 138,508,910, 191,125,784.52 and 76,620,866.48 is: 105,727,661.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,508,910 : 191,125,784.52 = 76,620,866.48 : x
  2. Step 2: Convert to fraction form
    138,508,910/191,125,784.52 = 76,620,866.48/x
  3. Step 3: Cross multiply
    138,508,910x = 191,125,784.52 × 76,620,866.48
  4. Step 4: Simplify right side
    138,508,910x = 14,644,223,216,592,172
  5. Step 5: Solve for x
    x = 14,644,223,216,592,172/138,508,910
  6. Step 6: Final answer
    x = 105,727,661.97

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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.