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Finding the Fourth Proportional to 189,201.60, 261,100.25 and 103,159.88

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Solution

The fourth proportional to 189,201.60, 261,100.25 and 103,159.88 is: 142,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,201.60 : 261,100.25 = 103,159.88 : x
  2. Step 2: Convert to fraction form
    189,201.60/261,100.25 = 103,159.88/x
  3. Step 3: Cross multiply
    189,201.60x = 261,100.25 × 103,159.88
  4. Step 4: Simplify right side
    189,201.60x = 26,935,068,636.67
  5. Step 5: Solve for x
    x = 26,935,068,636.67/189,201.60
  6. Step 6: Final answer
    x = 142,361.74

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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.