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Finding the Fourth Proportional to 202,421.80, 303,632.70 and 69,290.20

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Solution

The fourth proportional to 202,421.80, 303,632.70 and 69,290.20 is: 103,935.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,421.80 : 303,632.70 = 69,290.20 : x
  2. Step 2: Convert to fraction form
    202,421.80/303,632.70 = 69,290.20/x
  3. Step 3: Cross multiply
    202,421.80x = 303,632.70 × 69,290.20
  4. Step 4: Simplify right side
    202,421.80x = 21,038,770,509.54
  5. Step 5: Solve for x
    x = 21,038,770,509.54/202,421.80
  6. Step 6: Final answer
    x = 103,935.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.