Home / 55,440-76,507.20-30,289.68

Finding the Fourth Proportional to 55,440, 76,507.20 and 30,289.68

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Solution

The fourth proportional to 55,440, 76,507.20 and 30,289.68 is: 41,799.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,440 : 76,507.20 = 30,289.68 : x
  2. Step 2: Convert to fraction form
    55,440/76,507.20 = 30,289.68/x
  3. Step 3: Cross multiply
    55,440x = 76,507.20 × 30,289.68
  4. Step 4: Simplify right side
    55,440x = 2,317,378,605.70
  5. Step 5: Solve for x
    x = 2,317,378,605.70/55,440
  6. Step 6: Final answer
    x = 41,799.76

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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.