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Finding the Fourth Proportional to 84,075.71, 126,113.36 and 27,920.03

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Solution

The fourth proportional to 84,075.71, 126,113.36 and 27,920.03 is: 41,879.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,075.71 : 126,113.36 = 27,920.03 : x
  2. Step 2: Convert to fraction form
    84,075.71/126,113.36 = 27,920.03/x
  3. Step 3: Cross multiply
    84,075.71x = 126,113.36 × 27,920.03
  4. Step 4: Simplify right side
    84,075.71x = 3,521,088,024.43
  5. Step 5: Solve for x
    x = 3,521,088,024.43/84,075.71
  6. Step 6: Final answer
    x = 41,879.97

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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.