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Finding the Fourth Proportional to 90,602.70, 135,904.01 and 28,273.20

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Solution

The fourth proportional to 90,602.70, 135,904.01 and 28,273.20 is: 42,409.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,602.70 : 135,904.01 = 28,273.20 : x
  2. Step 2: Convert to fraction form
    90,602.70/135,904.01 = 28,273.20/x
  3. Step 3: Cross multiply
    90,602.70x = 135,904.01 × 28,273.20
  4. Step 4: Simplify right side
    90,602.70x = 3,842,441,114.17
  5. Step 5: Solve for x
    x = 3,842,441,114.17/90,602.70
  6. Step 6: Final answer
    x = 42,409.79

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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.