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Finding the Fourth Proportional to 84,649.20, 127,266.60 and 79,167.60

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Solution

The fourth proportional to 84,649.20, 127,266.60 and 79,167.60 is: 119,025.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,649.20 : 127,266.60 = 79,167.60 : x
  2. Step 2: Convert to fraction form
    84,649.20/127,266.60 = 79,167.60/x
  3. Step 3: Cross multiply
    84,649.20x = 127,266.60 × 79,167.60
  4. Step 4: Simplify right side
    84,649.20x = 10,075,391,282.16
  5. Step 5: Solve for x
    x = 10,075,391,282.16/84,649.20
  6. Step 6: Final answer
    x = 119,025.24

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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.