Home / 137,142.25-189,247.40-76,702.43

Finding the Fourth Proportional to 137,142.25, 189,247.40 and 76,702.43

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Solution

The fourth proportional to 137,142.25, 189,247.40 and 76,702.43 is: 105,844.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,142.25 : 189,247.40 = 76,702.43 : x
  2. Step 2: Convert to fraction form
    137,142.25/189,247.40 = 76,702.43/x
  3. Step 3: Cross multiply
    137,142.25x = 189,247.40 × 76,702.43
  4. Step 4: Simplify right side
    137,142.25x = 14,515,735,451.18
  5. Step 5: Solve for x
    x = 14,515,735,451.18/137,142.25
  6. Step 6: Final answer
    x = 105,844.37

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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.