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Finding the Fourth Proportional to 52,279.80, 78,419.70 and 17,220.60

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Solution

The fourth proportional to 52,279.80, 78,419.70 and 17,220.60 is: 25,830.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,279.80 : 78,419.70 = 17,220.60 : x
  2. Step 2: Convert to fraction form
    52,279.80/78,419.70 = 17,220.60/x
  3. Step 3: Cross multiply
    52,279.80x = 78,419.70 × 17,220.60
  4. Step 4: Simplify right side
    52,279.80x = 1,350,434,285.82
  5. Step 5: Solve for x
    x = 1,350,434,285.82/52,279.80
  6. Step 6: Final answer
    x = 25,830.90

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1.5x scale

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.