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Finding the Fourth Proportional to 91,202.60, 136,790.22 and 28,865

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Solution

The fourth proportional to 91,202.60, 136,790.22 and 28,865 is: 43,293.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,202.60 : 136,790.22 = 28,865 : x
  2. Step 2: Convert to fraction form
    91,202.60/136,790.22 = 28,865/x
  3. Step 3: Cross multiply
    91,202.60x = 136,790.22 × 28,865
  4. Step 4: Simplify right side
    91,202.60x = 3,948,449,700.30
  5. Step 5: Solve for x
    x = 3,948,449,700.30/91,202.60
  6. Step 6: Final answer
    x = 43,293.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.