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Finding the Fourth Proportional to 56,720.80, 85,084.40 and 17,279.20

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Solution

The fourth proportional to 56,720.80, 85,084.40 and 17,279.20 is: 25,919.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,720.80 : 85,084.40 = 17,279.20 : x
  2. Step 2: Convert to fraction form
    56,720.80/85,084.40 = 17,279.20/x
  3. Step 3: Cross multiply
    56,720.80x = 85,084.40 × 17,279.20
  4. Step 4: Simplify right side
    56,720.80x = 1,470,190,364.48
  5. Step 5: Solve for x
    x = 1,470,190,364.48/56,720.80
  6. Step 6: Final answer
    x = 25,919.77

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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.