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Finding the Fourth Proportional to 85,075.44, 127,686.91 and 84,878.61

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Solution

The fourth proportional to 85,075.44, 127,686.91 and 84,878.61 is: 127,391.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,075.44 : 127,686.91 = 84,878.61 : x
  2. Step 2: Convert to fraction form
    85,075.44/127,686.91 = 84,878.61/x
  3. Step 3: Cross multiply
    85,075.44x = 127,686.91 × 84,878.61
  4. Step 4: Simplify right side
    85,075.44x = 10,837,887,436.00
  5. Step 5: Solve for x
    x = 10,837,887,436.00/85,075.44
  6. Step 6: Final answer
    x = 127,391.49

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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.