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Finding the Fourth Proportional to 201,979.80, 302,969.70 and 61,720.20

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Solution

The fourth proportional to 201,979.80, 302,969.70 and 61,720.20 is: 92,580.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,979.80 : 302,969.70 = 61,720.20 : x
  2. Step 2: Convert to fraction form
    201,979.80/302,969.70 = 61,720.20/x
  3. Step 3: Cross multiply
    201,979.80x = 302,969.70 × 61,720.20
  4. Step 4: Simplify right side
    201,979.80x = 18,699,350,477.94
  5. Step 5: Solve for x
    x = 18,699,350,477.94/201,979.80
  6. Step 6: Final answer
    x = 92,580.30

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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.