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Finding the Fourth Proportional to 189,640.62, 261,492.03 and 155,077.92

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Solution

The fourth proportional to 189,640.62, 261,492.03 and 155,077.92 is: 213,834.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,640.62 : 261,492.03 = 155,077.92 : x
  2. Step 2: Convert to fraction form
    189,640.62/261,492.03 = 155,077.92/x
  3. Step 3: Cross multiply
    189,640.62x = 261,492.03 × 155,077.92
  4. Step 4: Simplify right side
    189,640.62x = 40,551,640,108.98
  5. Step 5: Solve for x
    x = 40,551,640,108.98/189,640.62
  6. Step 6: Final answer
    x = 213,834.15

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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.