Home / 138,899.12-191,680.84-75,236.72

Finding the Fourth Proportional to 138,899.12, 191,680.84 and 75,236.72

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Solution

The fourth proportional to 138,899.12, 191,680.84 and 75,236.72 is: 103,826.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,899.12 : 191,680.84 = 75,236.72 : x
  2. Step 2: Convert to fraction form
    138,899.12/191,680.84 = 75,236.72/x
  3. Step 3: Cross multiply
    138,899.12x = 191,680.84 × 75,236.72
  4. Step 4: Simplify right side
    138,899.12x = 14,421,437,688.44
  5. Step 5: Solve for x
    x = 14,421,437,688.44/138,899.12
  6. Step 6: Final answer
    x = 103,826.70

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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.