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Finding the Fourth Proportional to 209,716.60, 314,618.58 and 69,486.20

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Solution

The fourth proportional to 209,716.60, 314,618.58 and 69,486.20 is: 104,243.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,716.60 : 314,618.58 = 69,486.20 : x
  2. Step 2: Convert to fraction form
    209,716.60/314,618.58 = 69,486.20/x
  3. Step 3: Cross multiply
    209,716.60x = 314,618.58 × 69,486.20
  4. Step 4: Simplify right side
    209,716.60x = 21,861,649,573.60
  5. Step 5: Solve for x
    x = 21,861,649,573.60/209,716.60
  6. Step 6: Final answer
    x = 104,243.77

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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.