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Finding the Fourth Proportional to 189,643.45, 261,707.13 and 104,760.51

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Solution

The fourth proportional to 189,643.45, 261,707.13 and 104,760.51 is: 144,569.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,643.45 : 261,707.13 = 104,760.51 : x
  2. Step 2: Convert to fraction form
    189,643.45/261,707.13 = 104,760.51/x
  3. Step 3: Cross multiply
    189,643.45x = 261,707.13 × 104,760.51
  4. Step 4: Simplify right side
    189,643.45x = 27,416,572,409.44
  5. Step 5: Solve for x
    x = 27,416,572,409.44/189,643.45
  6. Step 6: Final answer
    x = 144,569.04

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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.