Home / 138,826.20-208,085.70-76,541.40

Finding the Fourth Proportional to 138,826.20, 208,085.70 and 76,541.40

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Solution

The fourth proportional to 138,826.20, 208,085.70 and 76,541.40 is: 114,727.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,826.20 : 208,085.70 = 76,541.40 : x
  2. Step 2: Convert to fraction form
    138,826.20/208,085.70 = 76,541.40/x
  3. Step 3: Cross multiply
    138,826.20x = 208,085.70 × 76,541.40
  4. Step 4: Simplify right side
    138,826.20x = 15,927,170,797.98
  5. Step 5: Solve for x
    x = 15,927,170,797.98/138,826.20
  6. Step 6: Final answer
    x = 114,727.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.