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Finding the Fourth Proportional to 189,170.40, 261,056.90 and 104,290.50

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Solution

The fourth proportional to 189,170.40, 261,056.90 and 104,290.50 is: 143,921.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,170.40 : 261,056.90 = 104,290.50 : x
  2. Step 2: Convert to fraction form
    189,170.40/261,056.90 = 104,290.50/x
  3. Step 3: Cross multiply
    189,170.40x = 261,056.90 × 104,290.50
  4. Step 4: Simplify right side
    189,170.40x = 27,225,754,629.45
  5. Step 5: Solve for x
    x = 27,225,754,629.45/189,170.40
  6. Step 6: Final answer
    x = 143,921.85

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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.