Home / 138,869.66-191,643.64-85,184.28

Finding the Fourth Proportional to 138,869.66, 191,643.64 and 85,184.28

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Solution

The fourth proportional to 138,869.66, 191,643.64 and 85,184.28 is: 117,556.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,869.66 : 191,643.64 = 85,184.28 : x
  2. Step 2: Convert to fraction form
    138,869.66/191,643.64 = 85,184.28/x
  3. Step 3: Cross multiply
    138,869.66x = 191,643.64 × 85,184.28
  4. Step 4: Simplify right side
    138,869.66x = 16,325,025,489.98
  5. Step 5: Solve for x
    x = 16,325,025,489.98/138,869.66
  6. Step 6: Final answer
    x = 117,556.46

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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.