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Finding the Fourth Proportional to 189,374.88, 261,227.10 and 121,367.64

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Solution

The fourth proportional to 189,374.88, 261,227.10 and 121,367.64 is: 167,416.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,374.88 : 261,227.10 = 121,367.64 : x
  2. Step 2: Convert to fraction form
    189,374.88/261,227.10 = 121,367.64/x
  3. Step 3: Cross multiply
    189,374.88x = 261,227.10 × 121,367.64
  4. Step 4: Simplify right side
    189,374.88x = 31,704,516,631.04
  5. Step 5: Solve for x
    x = 31,704,516,631.04/189,374.88
  6. Step 6: Final answer
    x = 167,416.70

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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.