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Finding the Fourth Proportional to 209,951.60, 315,000.30 and 91,707.80

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Solution

The fourth proportional to 209,951.60, 315,000.30 and 91,707.80 is: 137,593.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,951.60 : 315,000.30 = 91,707.80 : x
  2. Step 2: Convert to fraction form
    209,951.60/315,000.30 = 91,707.80/x
  3. Step 3: Cross multiply
    209,951.60x = 315,000.30 × 91,707.80
  4. Step 4: Simplify right side
    209,951.60x = 28,887,984,512.34
  5. Step 5: Solve for x
    x = 28,887,984,512.34/209,951.60
  6. Step 6: Final answer
    x = 137,593.54

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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.