Home / 138,826.60-208,188.70-45,335.40

Finding the Fourth Proportional to 138,826.60, 208,188.70 and 45,335.40

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Solution

The fourth proportional to 138,826.60, 208,188.70 and 45,335.40 is: 67,986.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,826.60 : 208,188.70 = 45,335.40 : x
  2. Step 2: Convert to fraction form
    138,826.60/208,188.70 = 45,335.40/x
  3. Step 3: Cross multiply
    138,826.60x = 208,188.70 × 45,335.40
  4. Step 4: Simplify right side
    138,826.60x = 9,438,317,989.98
  5. Step 5: Solve for x
    x = 9,438,317,989.98/138,826.60
  6. Step 6: Final answer
    x = 67,986.38

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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.