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Finding the Fourth Proportional to 103,893.92, 143,444.76 and 66,219.20

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Solution

The fourth proportional to 103,893.92, 143,444.76 and 66,219.20 is: 91,427.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,893.92 : 143,444.76 = 66,219.20 : x
  2. Step 2: Convert to fraction form
    103,893.92/143,444.76 = 66,219.20/x
  3. Step 3: Cross multiply
    103,893.92x = 143,444.76 × 66,219.20
  4. Step 4: Simplify right side
    103,893.92x = 9,498,797,251.39
  5. Step 5: Solve for x
    x = 9,498,797,251.39/103,893.92
  6. Step 6: Final answer
    x = 91,427.85

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1.5x scale

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.