Home / 228,336.90-315,231.60-137,715.72

Finding the Fourth Proportional to 228,336.90, 315,231.60 and 137,715.72

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Solution

The fourth proportional to 228,336.90, 315,231.60 and 137,715.72 is: 190,124.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,336.90 : 315,231.60 = 137,715.72 : x
  2. Step 2: Convert to fraction form
    228,336.90/315,231.60 = 137,715.72/x
  3. Step 3: Cross multiply
    228,336.90x = 315,231.60 × 137,715.72
  4. Step 4: Simplify right side
    228,336.90x = 43,412,346,760.75
  5. Step 5: Solve for x
    x = 43,412,346,760.75/228,336.90
  6. Step 6: Final answer
    x = 190,124.10

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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.