Home / 189,688.31-261,891.91-121,734.58

Finding the Fourth Proportional to 189,688.31, 261,891.91 and 121,734.58

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Solution

The fourth proportional to 189,688.31, 261,891.91 and 121,734.58 is: 168,072.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,688.31 : 261,891.91 = 121,734.58 : x
  2. Step 2: Convert to fraction form
    189,688.31/261,891.91 = 121,734.58/x
  3. Step 3: Cross multiply
    189,688.31x = 261,891.91 × 121,734.58
  4. Step 4: Simplify right side
    189,688.31x = 31,881,301,315.36
  5. Step 5: Solve for x
    x = 31,881,301,315.36/189,688.31
  6. Step 6: Final answer
    x = 168,072.04

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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.