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Finding the Fourth Proportional to 136,401.71, 188,182.19 and 85,393.31

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Solution

The fourth proportional to 136,401.71, 188,182.19 and 85,393.31 is: 117,810.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,401.71 : 188,182.19 = 85,393.31 : x
  2. Step 2: Convert to fraction form
    136,401.71/188,182.19 = 85,393.31/x
  3. Step 3: Cross multiply
    136,401.71x = 188,182.19 × 85,393.31
  4. Step 4: Simplify right side
    136,401.71x = 16,069,499,660.18
  5. Step 5: Solve for x
    x = 16,069,499,660.18/136,401.71
  6. Step 6: Final answer
    x = 117,810.10

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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.