Home / 189,265.30-261,120.16-121,319.74

Finding the Fourth Proportional to 189,265.30, 261,120.16 and 121,319.74

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Solution

The fourth proportional to 189,265.30, 261,120.16 and 121,319.74 is: 167,378.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,265.30 : 261,120.16 = 121,319.74 : x
  2. Step 2: Convert to fraction form
    189,265.30/261,120.16 = 121,319.74/x
  3. Step 3: Cross multiply
    189,265.30x = 261,120.16 × 121,319.74
  4. Step 4: Simplify right side
    189,265.30x = 31,679,029,919.96
  5. Step 5: Solve for x
    x = 31,679,029,919.96/189,265.30
  6. Step 6: Final answer
    x = 167,378.96

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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.