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Finding the Fourth Proportional to 189,039.78, 260,874.68 and 104,156.82

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Solution

The fourth proportional to 189,039.78, 260,874.68 and 104,156.82 is: 143,736.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,039.78 : 260,874.68 = 104,156.82 : x
  2. Step 2: Convert to fraction form
    189,039.78/260,874.68 = 104,156.82/x
  3. Step 3: Cross multiply
    189,039.78x = 260,874.68 × 104,156.82
  4. Step 4: Simplify right side
    189,039.78x = 27,171,877,087.32
  5. Step 5: Solve for x
    x = 27,171,877,087.32/189,039.78
  6. Step 6: Final answer
    x = 143,736.29

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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.