Home / 189,929.47-261,846.18-121,828.22

Finding the Fourth Proportional to 189,929.47, 261,846.18 and 121,828.22

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Solution

The fourth proportional to 189,929.47, 261,846.18 and 121,828.22 is: 167,958.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,929.47 : 261,846.18 = 121,828.22 : x
  2. Step 2: Convert to fraction form
    189,929.47/261,846.18 = 121,828.22/x
  3. Step 3: Cross multiply
    189,929.47x = 261,846.18 × 121,828.22
  4. Step 4: Simplify right side
    189,929.47x = 31,900,254,023.20
  5. Step 5: Solve for x
    x = 31,900,254,023.20/189,929.47
  6. Step 6: Final answer
    x = 167,958.42

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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.