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Finding the Fourth Proportional to 138,991.77, 191,807.87 and 75,329.55

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Solution

The fourth proportional to 138,991.77, 191,807.87 and 75,329.55 is: 103,954.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,991.77 : 191,807.87 = 75,329.55 : x
  2. Step 2: Convert to fraction form
    138,991.77/191,807.87 = 75,329.55/x
  3. Step 3: Cross multiply
    138,991.77x = 191,807.87 × 75,329.55
  4. Step 4: Simplify right side
    138,991.77x = 14,448,800,156.91
  5. Step 5: Solve for x
    x = 14,448,800,156.91/138,991.77
  6. Step 6: Final answer
    x = 103,954.36

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1.5x scale

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.