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Finding the Fourth Proportional to 228,246.38, 342,302.63 and 85,989

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Solution

The fourth proportional to 228,246.38, 342,302.63 and 85,989 is: 128,958.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,246.38 : 342,302.63 = 85,989 : x
  2. Step 2: Convert to fraction form
    228,246.38/342,302.63 = 85,989/x
  3. Step 3: Cross multiply
    228,246.38x = 342,302.63 × 85,989
  4. Step 4: Simplify right side
    228,246.38x = 29,434,260,421.13
  5. Step 5: Solve for x
    x = 29,434,260,421.13/228,246.38
  6. Step 6: Final answer
    x = 128,958.28

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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.