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Finding the Fourth Proportional to 92,911.72, 128,218.40 and 50,469.36

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Solution

The fourth proportional to 92,911.72, 128,218.40 and 50,469.36 is: 69,647.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,911.72 : 128,218.40 = 50,469.36 : x
  2. Step 2: Convert to fraction form
    92,911.72/128,218.40 = 50,469.36/x
  3. Step 3: Cross multiply
    92,911.72x = 128,218.40 × 50,469.36
  4. Step 4: Simplify right side
    92,911.72x = 6,471,100,588.22
  5. Step 5: Solve for x
    x = 6,471,100,588.22/92,911.72
  6. Step 6: Final answer
    x = 69,647.84

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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.