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Finding the Fourth Proportional to 189,678.76, 261,762 and 104,801.32

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Solution

The fourth proportional to 189,678.76, 261,762 and 104,801.32 is: 144,628.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,678.76 : 261,762 = 104,801.32 : x
  2. Step 2: Convert to fraction form
    189,678.76/261,762 = 104,801.32/x
  3. Step 3: Cross multiply
    189,678.76x = 261,762 × 104,801.32
  4. Step 4: Simplify right side
    189,678.76x = 27,433,003,125.84
  5. Step 5: Solve for x
    x = 27,433,003,125.84/189,678.76
  6. Step 6: Final answer
    x = 144,628.76

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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.