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Finding the Fourth Proportional to 90,059.72, 135,128.46 and 48,498.44

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Solution

The fourth proportional to 90,059.72, 135,128.46 and 48,498.44 is: 72,768.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,059.72 : 135,128.46 = 48,498.44 : x
  2. Step 2: Convert to fraction form
    90,059.72/135,128.46 = 48,498.44/x
  3. Step 3: Cross multiply
    90,059.72x = 135,128.46 × 48,498.44
  4. Step 4: Simplify right side
    90,059.72x = 6,553,519,509.60
  5. Step 5: Solve for x
    x = 6,553,519,509.60/90,059.72
  6. Step 6: Final answer
    x = 72,768.60

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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.