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Finding the Fourth Proportional to 76,311.60, 114,465.60 and 20,907.60

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Solution

The fourth proportional to 76,311.60, 114,465.60 and 20,907.60 is: 31,360.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,311.60 : 114,465.60 = 20,907.60 : x
  2. Step 2: Convert to fraction form
    76,311.60/114,465.60 = 20,907.60/x
  3. Step 3: Cross multiply
    76,311.60x = 114,465.60 × 20,907.60
  4. Step 4: Simplify right side
    76,311.60x = 2,393,200,978.56
  5. Step 5: Solve for x
    x = 2,393,200,978.56/76,311.60
  6. Step 6: Final answer
    x = 31,360.91

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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.