Home / 55,140.20-76,087.14-31,262.12

Finding the Fourth Proportional to 55,140.20, 76,087.14 and 31,262.12

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Solution

The fourth proportional to 55,140.20, 76,087.14 and 31,262.12 is: 43,138.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,140.20 : 76,087.14 = 31,262.12 : x
  2. Step 2: Convert to fraction form
    55,140.20/76,087.14 = 31,262.12/x
  3. Step 3: Cross multiply
    55,140.20x = 76,087.14 × 31,262.12
  4. Step 4: Simplify right side
    55,140.20x = 2,378,645,301.14
  5. Step 5: Solve for x
    x = 2,378,645,301.14/55,140.20
  6. Step 6: Final answer
    x = 43,138.13

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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.