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Finding the Fourth Proportional to 189,113.81, 260,978.29 and 104,230.87

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Solution

The fourth proportional to 189,113.81, 260,978.29 and 104,230.87 is: 143,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,113.81 : 260,978.29 = 104,230.87 : x
  2. Step 2: Convert to fraction form
    189,113.81/260,978.29 = 104,230.87/x
  3. Step 3: Cross multiply
    189,113.81x = 260,978.29 × 104,230.87
  4. Step 4: Simplify right side
    189,113.81x = 27,201,993,304.79
  5. Step 5: Solve for x
    x = 27,201,993,304.79/189,113.81
  6. Step 6: Final answer
    x = 143,839.28

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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.