Home / 228,961.36-315,925.94-138,256.55

Finding the Fourth Proportional to 228,961.36, 315,925.94 and 138,256.55

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Solution

The fourth proportional to 228,961.36, 315,925.94 and 138,256.55 is: 190,769.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,961.36 : 315,925.94 = 138,256.55 : x
  2. Step 2: Convert to fraction form
    228,961.36/315,925.94 = 138,256.55/x
  3. Step 3: Cross multiply
    228,961.36x = 315,925.94 × 138,256.55
  4. Step 4: Simplify right side
    228,961.36x = 43,678,829,285.92
  5. Step 5: Solve for x
    x = 43,678,829,285.92/228,961.36
  6. Step 6: Final answer
    x = 190,769.44

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1.5x scale

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.