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Finding the Fourth Proportional to 189,162.66, 261,037.80 and 103,119.88

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Solution

The fourth proportional to 189,162.66, 261,037.80 and 103,119.88 is: 142,301.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,162.66 : 261,037.80 = 103,119.88 : x
  2. Step 2: Convert to fraction form
    189,162.66/261,037.80 = 103,119.88/x
  3. Step 3: Cross multiply
    189,162.66x = 261,037.80 × 103,119.88
  4. Step 4: Simplify right side
    189,162.66x = 26,918,186,611.46
  5. Step 5: Solve for x
    x = 26,918,186,611.46/189,162.66
  6. Step 6: Final answer
    x = 142,301.80

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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.