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Finding the Fourth Proportional to 81,401.40, 121,907.70 and 49,908.60

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Solution

The fourth proportional to 81,401.40, 121,907.70 and 49,908.60 is: 74,743.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,401.40 : 121,907.70 = 49,908.60 : x
  2. Step 2: Convert to fraction form
    81,401.40/121,907.70 = 49,908.60/x
  3. Step 3: Cross multiply
    81,401.40x = 121,907.70 × 49,908.60
  4. Step 4: Simplify right side
    81,401.40x = 6,084,242,636.22
  5. Step 5: Solve for x
    x = 6,084,242,636.22/81,401.40
  6. Step 6: Final answer
    x = 74,743.71

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1.5x scale

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.