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Finding the Fourth Proportional to 265,063.40, 397,458.90 and 78,050.60

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Solution

The fourth proportional to 265,063.40, 397,458.90 and 78,050.60 is: 117,035.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,063.40 : 397,458.90 = 78,050.60 : x
  2. Step 2: Convert to fraction form
    265,063.40/397,458.90 = 78,050.60/x
  3. Step 3: Cross multiply
    265,063.40x = 397,458.90 × 78,050.60
  4. Step 4: Simplify right side
    265,063.40x = 31,021,905,620.34
  5. Step 5: Solve for x
    x = 31,021,905,620.34/265,063.40
  6. Step 6: Final answer
    x = 117,035.79

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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.