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Finding the Fourth Proportional to 56,620.80, 84,909.60 and 17,164.80

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Solution

The fourth proportional to 56,620.80, 84,909.60 and 17,164.80 is: 25,740.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,620.80 : 84,909.60 = 17,164.80 : x
  2. Step 2: Convert to fraction form
    56,620.80/84,909.60 = 17,164.80/x
  3. Step 3: Cross multiply
    56,620.80x = 84,909.60 × 17,164.80
  4. Step 4: Simplify right side
    56,620.80x = 1,457,456,302.08
  5. Step 5: Solve for x
    x = 1,457,456,302.08/56,620.80
  6. Step 6: Final answer
    x = 25,740.65

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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.