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Finding the Fourth Proportional to 84,843.09, 127,212.32 and 28,677.90

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Solution

The fourth proportional to 84,843.09, 127,212.32 and 28,677.90 is: 42,999.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,843.09 : 127,212.32 = 28,677.90 : x
  2. Step 2: Convert to fraction form
    84,843.09/127,212.32 = 28,677.90/x
  3. Step 3: Cross multiply
    84,843.09x = 127,212.32 × 28,677.90
  4. Step 4: Simplify right side
    84,843.09x = 3,648,182,048.34
  5. Step 5: Solve for x
    x = 3,648,182,048.34/84,843.09
  6. Step 6: Final answer
    x = 42,999.17

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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.