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Finding the Fourth Proportional to 189,378.90, 261,342.59 and 104,495.90

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Solution

The fourth proportional to 189,378.90, 261,342.59 and 104,495.90 is: 144,204.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,378.90 : 261,342.59 = 104,495.90 : x
  2. Step 2: Convert to fraction form
    189,378.90/261,342.59 = 104,495.90/x
  3. Step 3: Cross multiply
    189,378.90x = 261,342.59 × 104,495.90
  4. Step 4: Simplify right side
    189,378.90x = 27,309,227,321.19
  5. Step 5: Solve for x
    x = 27,309,227,321.19/189,378.90
  6. Step 6: Final answer
    x = 144,204.17

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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.