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Finding the Fourth Proportional to 174,678.40, 261,790.80 and 80,984.80

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Solution

The fourth proportional to 174,678.40, 261,790.80 and 80,984.80 is: 121,372.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,678.40 : 261,790.80 = 80,984.80 : x
  2. Step 2: Convert to fraction form
    174,678.40/261,790.80 = 80,984.80/x
  3. Step 3: Cross multiply
    174,678.40x = 261,790.80 × 80,984.80
  4. Step 4: Simplify right side
    174,678.40x = 21,201,075,579.84
  5. Step 5: Solve for x
    x = 21,201,075,579.84/174,678.40
  6. Step 6: Final answer
    x = 121,372.05

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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.