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Finding the Fourth Proportional to 90,735.69, 125,206.69 and 52,489.11

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Solution

The fourth proportional to 90,735.69, 125,206.69 and 52,489.11 is: 72,430.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,735.69 : 125,206.69 = 52,489.11 : x
  2. Step 2: Convert to fraction form
    90,735.69/125,206.69 = 52,489.11/x
  3. Step 3: Cross multiply
    90,735.69x = 125,206.69 × 52,489.11
  4. Step 4: Simplify right side
    90,735.69x = 6,571,987,724.15
  5. Step 5: Solve for x
    x = 6,571,987,724.15/90,735.69
  6. Step 6: Final answer
    x = 72,430.02

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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.