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Finding the Fourth Proportional to 85,406.73, 128,024.36 and 29,208.39

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Solution

The fourth proportional to 85,406.73, 128,024.36 and 29,208.39 is: 43,783.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.73 : 128,024.36 = 29,208.39 : x
  2. Step 2: Convert to fraction form
    85,406.73/128,024.36 = 29,208.39/x
  3. Step 3: Cross multiply
    85,406.73x = 128,024.36 × 29,208.39
  4. Step 4: Simplify right side
    85,406.73x = 3,739,384,919.78
  5. Step 5: Solve for x
    x = 3,739,384,919.78/85,406.73
  6. Step 6: Final answer
    x = 43,783.26

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1.5x scale

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.