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Finding the Fourth Proportional to 174,860.80, 261,988.80 and 81,174.40

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Solution

The fourth proportional to 174,860.80, 261,988.80 and 81,174.40 is: 121,621.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,860.80 : 261,988.80 = 81,174.40 : x
  2. Step 2: Convert to fraction form
    174,860.80/261,988.80 = 81,174.40/x
  3. Step 3: Cross multiply
    174,860.80x = 261,988.80 × 81,174.40
  4. Step 4: Simplify right side
    174,860.80x = 21,266,783,646.72
  5. Step 5: Solve for x
    x = 21,266,783,646.72/174,860.80
  6. Step 6: Final answer
    x = 121,621.22

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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.