Home / 55,139.76-76,091.28-31,268.64

Finding the Fourth Proportional to 55,139.76, 76,091.28 and 31,268.64

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Solution

The fourth proportional to 55,139.76, 76,091.28 and 31,268.64 is: 43,149.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,139.76 : 76,091.28 = 31,268.64 : x
  2. Step 2: Convert to fraction form
    55,139.76/76,091.28 = 31,268.64/x
  3. Step 3: Cross multiply
    55,139.76x = 76,091.28 × 31,268.64
  4. Step 4: Simplify right side
    55,139.76x = 2,379,270,841.46
  5. Step 5: Solve for x
    x = 2,379,270,841.46/55,139.76
  6. Step 6: Final answer
    x = 43,149.82

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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.