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Finding the Fourth Proportional to 138,753.06, 191,479.21 and 75,090.87

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Solution

The fourth proportional to 138,753.06, 191,479.21 and 75,090.87 is: 103,625.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,753.06 : 191,479.21 = 75,090.87 : x
  2. Step 2: Convert to fraction form
    138,753.06/191,479.21 = 75,090.87/x
  3. Step 3: Cross multiply
    138,753.06x = 191,479.21 × 75,090.87
  4. Step 4: Simplify right side
    138,753.06x = 14,378,340,465.81
  5. Step 5: Solve for x
    x = 14,378,340,465.81/138,753.06
  6. Step 6: Final answer
    x = 103,625.39

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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.