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Finding the Fourth Proportional to 207,863.10, 311,886.45 and 101,187.90

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Solution

The fourth proportional to 207,863.10, 311,886.45 and 101,187.90 is: 151,826.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,863.10 : 311,886.45 = 101,187.90 : x
  2. Step 2: Convert to fraction form
    207,863.10/311,886.45 = 101,187.90/x
  3. Step 3: Cross multiply
    207,863.10x = 311,886.45 × 101,187.90
  4. Step 4: Simplify right side
    207,863.10x = 31,559,134,913.96
  5. Step 5: Solve for x
    x = 31,559,134,913.96/207,863.10
  6. Step 6: Final answer
    x = 151,826.54

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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.