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Finding the Fourth Proportional to 228,290.21, 315,167.18 and 137,669.13

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Solution

The fourth proportional to 228,290.21, 315,167.18 and 137,669.13 is: 190,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,290.21 : 315,167.18 = 137,669.13 : x
  2. Step 2: Convert to fraction form
    228,290.21/315,167.18 = 137,669.13/x
  3. Step 3: Cross multiply
    228,290.21x = 315,167.18 × 137,669.13
  4. Step 4: Simplify right side
    228,290.21x = 43,388,791,475.15
  5. Step 5: Solve for x
    x = 43,388,791,475.15/228,290.21
  6. Step 6: Final answer
    x = 190,059.80

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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.