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Finding the Fourth Proportional to 209,989.70, 314,902.65 and 91,580.30

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Solution

The fourth proportional to 209,989.70, 314,902.65 and 91,580.30 is: 137,334.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,989.70 : 314,902.65 = 91,580.30 : x
  2. Step 2: Convert to fraction form
    209,989.70/314,902.65 = 91,580.30/x
  3. Step 3: Cross multiply
    209,989.70x = 314,902.65 × 91,580.30
  4. Step 4: Simplify right side
    209,989.70x = 28,838,879,157.80
  5. Step 5: Solve for x
    x = 28,838,879,157.80/209,989.70
  6. Step 6: Final answer
    x = 137,334.73

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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.