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Finding the Fourth Proportional to 199,558, 299,396.40 and 115,297.60

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Solution

The fourth proportional to 199,558, 299,396.40 and 115,297.60 is: 172,980.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,558 : 299,396.40 = 115,297.60 : x
  2. Step 2: Convert to fraction form
    199,558/299,396.40 = 115,297.60/x
  3. Step 3: Cross multiply
    199,558x = 299,396.40 × 115,297.60
  4. Step 4: Simplify right side
    199,558x = 34,519,686,368.64
  5. Step 5: Solve for x
    x = 34,519,686,368.64/199,558
  6. Step 6: Final answer
    x = 172,980.72

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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.