Home / 189,266.30-261,121.54-121,320.74

Finding the Fourth Proportional to 189,266.30, 261,121.54 and 121,320.74

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Solution

The fourth proportional to 189,266.30, 261,121.54 and 121,320.74 is: 167,380.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,266.30 : 261,121.54 = 121,320.74 : x
  2. Step 2: Convert to fraction form
    189,266.30/261,121.54 = 121,320.74/x
  3. Step 3: Cross multiply
    189,266.30x = 261,121.54 × 121,320.74
  4. Step 4: Simplify right side
    189,266.30x = 31,679,458,462.74
  5. Step 5: Solve for x
    x = 31,679,458,462.74/189,266.30
  6. Step 6: Final answer
    x = 167,380.34

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1.5x scale

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.