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Finding the Fourth Proportional to 260,048.60, 390,072.90 and 126,949.40

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Solution

The fourth proportional to 260,048.60, 390,072.90 and 126,949.40 is: 190,424.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,048.60 : 390,072.90 = 126,949.40 : x
  2. Step 2: Convert to fraction form
    260,048.60/390,072.90 = 126,949.40/x
  3. Step 3: Cross multiply
    260,048.60x = 390,072.90 × 126,949.40
  4. Step 4: Simplify right side
    260,048.60x = 49,519,520,611.26
  5. Step 5: Solve for x
    x = 49,519,520,611.26/260,048.60
  6. Step 6: Final answer
    x = 190,424.10

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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.