Home / 55,721.10-76,895.76-30,570.60

Finding the Fourth Proportional to 55,721.10, 76,895.76 and 30,570.60

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Solution

The fourth proportional to 55,721.10, 76,895.76 and 30,570.60 is: 42,187.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,721.10 : 76,895.76 = 30,570.60 : x
  2. Step 2: Convert to fraction form
    55,721.10/76,895.76 = 30,570.60/x
  3. Step 3: Cross multiply
    55,721.10x = 76,895.76 × 30,570.60
  4. Step 4: Simplify right side
    55,721.10x = 2,350,749,520.66
  5. Step 5: Solve for x
    x = 2,350,749,520.66/55,721.10
  6. Step 6: Final answer
    x = 42,187.78

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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.