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Finding the Fourth Proportional to 84,698.39, 127,041.63 and 39,729.60

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Solution

The fourth proportional to 84,698.39, 127,041.63 and 39,729.60 is: 59,591.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,698.39 : 127,041.63 = 39,729.60 : x
  2. Step 2: Convert to fraction form
    84,698.39/127,041.63 = 39,729.60/x
  3. Step 3: Cross multiply
    84,698.39x = 127,041.63 × 39,729.60
  4. Step 4: Simplify right side
    84,698.39x = 5,047,313,143.25
  5. Step 5: Solve for x
    x = 5,047,313,143.25/84,698.39
  6. Step 6: Final answer
    x = 59,591.61

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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.