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Finding the Fourth Proportional to 76,777.20, 111,015.90 and 76,777.20

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Solution

The fourth proportional to 76,777.20, 111,015.90 and 76,777.20 is: 111,015.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,777.20 : 111,015.90 = 76,777.20 : x
  2. Step 2: Convert to fraction form
    76,777.20/111,015.90 = 76,777.20/x
  3. Step 3: Cross multiply
    76,777.20x = 111,015.90 × 76,777.20
  4. Step 4: Simplify right side
    76,777.20x = 8,523,489,957.48
  5. Step 5: Solve for x
    x = 8,523,489,957.48/76,777.20
  6. Step 6: Final answer
    x = 111,015.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.