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Finding the Fourth Proportional to 84,807.13, 127,225.36 and 28,647.65

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Solution

The fourth proportional to 84,807.13, 127,225.36 and 28,647.65 is: 42,976.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,807.13 : 127,225.36 = 28,647.65 : x
  2. Step 2: Convert to fraction form
    84,807.13/127,225.36 = 28,647.65/x
  3. Step 3: Cross multiply
    84,807.13x = 127,225.36 × 28,647.65
  4. Step 4: Simplify right side
    84,807.13x = 3,644,706,876.66
  5. Step 5: Solve for x
    x = 3,644,706,876.66/84,807.13
  6. Step 6: Final answer
    x = 42,976.42

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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.