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Finding the Fourth Proportional to 209,805.84, 314,767.16 and 91,487.60

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Solution

The fourth proportional to 209,805.84, 314,767.16 and 91,487.60 is: 137,256.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,805.84 : 314,767.16 = 91,487.60 : x
  2. Step 2: Convert to fraction form
    209,805.84/314,767.16 = 91,487.60/x
  3. Step 3: Cross multiply
    209,805.84x = 314,767.16 × 91,487.60
  4. Step 4: Simplify right side
    209,805.84x = 28,797,292,027.22
  5. Step 5: Solve for x
    x = 28,797,292,027.22/209,805.84
  6. Step 6: Final answer
    x = 137,256.87

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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.