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Finding the Fourth Proportional to 138,593.02, 191,288.04 and 87,573.36

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Solution

The fourth proportional to 138,593.02, 191,288.04 and 87,573.36 is: 120,869.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,593.02 : 191,288.04 = 87,573.36 : x
  2. Step 2: Convert to fraction form
    138,593.02/191,288.04 = 87,573.36/x
  3. Step 3: Cross multiply
    138,593.02x = 191,288.04 × 87,573.36
  4. Step 4: Simplify right side
    138,593.02x = 16,751,736,390.61
  5. Step 5: Solve for x
    x = 16,751,736,390.61/138,593.02
  6. Step 6: Final answer
    x = 120,869.99

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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.