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Finding the Fourth Proportional to 189,436.55, 261,421.90 and 104,553

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Solution

The fourth proportional to 189,436.55, 261,421.90 and 104,553 is: 144,282.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,436.55 : 261,421.90 = 104,553 : x
  2. Step 2: Convert to fraction form
    189,436.55/261,421.90 = 104,553/x
  3. Step 3: Cross multiply
    189,436.55x = 261,421.90 × 104,553
  4. Step 4: Simplify right side
    189,436.55x = 27,332,443,387.94
  5. Step 5: Solve for x
    x = 27,332,443,387.94/189,436.55
  6. Step 6: Final answer
    x = 144,282.84

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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.