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Finding the Fourth Proportional to 84,828.60, 127,242.90 and 82,860.30

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Solution

The fourth proportional to 84,828.60, 127,242.90 and 82,860.30 is: 124,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,828.60 : 127,242.90 = 82,860.30 : x
  2. Step 2: Convert to fraction form
    84,828.60/127,242.90 = 82,860.30/x
  3. Step 3: Cross multiply
    84,828.60x = 127,242.90 × 82,860.30
  4. Step 4: Simplify right side
    84,828.60x = 10,543,384,866.87
  5. Step 5: Solve for x
    x = 10,543,384,866.87/84,828.60
  6. Step 6: Final answer
    x = 124,290.45

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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.