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Finding the Fourth Proportional to 55,608.50, 76,739.74 and 30,458.90

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Solution

The fourth proportional to 55,608.50, 76,739.74 and 30,458.90 is: 42,033.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,608.50 : 76,739.74 = 30,458.90 : x
  2. Step 2: Convert to fraction form
    55,608.50/76,739.74 = 30,458.90/x
  3. Step 3: Cross multiply
    55,608.50x = 76,739.74 × 30,458.90
  4. Step 4: Simplify right side
    55,608.50x = 2,337,408,066.69
  5. Step 5: Solve for x
    x = 2,337,408,066.69/55,608.50
  6. Step 6: Final answer
    x = 42,033.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.