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Finding the Fourth Proportional to 260,100.20, 390,279.90 and 147,866.60

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Solution

The fourth proportional to 260,100.20, 390,279.90 and 147,866.60 is: 221,873.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,100.20 : 390,279.90 = 147,866.60 : x
  2. Step 2: Convert to fraction form
    260,100.20/390,279.90 = 147,866.60/x
  3. Step 3: Cross multiply
    260,100.20x = 390,279.90 × 147,866.60
  4. Step 4: Simplify right side
    260,100.20x = 57,709,361,861.34
  5. Step 5: Solve for x
    x = 57,709,361,861.34/260,100.20
  6. Step 6: Final answer
    x = 221,873.58

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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.