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Finding the Fourth Proportional to 189,410.80, 261,381.72 and 104,521.72

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Solution

The fourth proportional to 189,410.80, 261,381.72 and 104,521.72 is: 144,237.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,410.80 : 261,381.72 = 104,521.72 : x
  2. Step 2: Convert to fraction form
    189,410.80/261,381.72 = 104,521.72/x
  3. Step 3: Cross multiply
    189,410.80x = 261,381.72 × 104,521.72
  4. Step 4: Simplify right side
    189,410.80x = 27,320,066,950.96
  5. Step 5: Solve for x
    x = 27,320,066,950.96/189,410.80
  6. Step 6: Final answer
    x = 144,237.11

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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.