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Finding the Fourth Proportional to 55,362.80, 76,399.80 and 30,211.76

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Solution

The fourth proportional to 55,362.80, 76,399.80 and 30,211.76 is: 41,691.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,362.80 : 76,399.80 = 30,211.76 : x
  2. Step 2: Convert to fraction form
    55,362.80/76,399.80 = 30,211.76/x
  3. Step 3: Cross multiply
    55,362.80x = 76,399.80 × 30,211.76
  4. Step 4: Simplify right side
    55,362.80x = 2,308,172,421.65
  5. Step 5: Solve for x
    x = 2,308,172,421.65/55,362.80
  6. Step 6: Final answer
    x = 41,691.76

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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.