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Finding the Fourth Proportional to 85,548.78, 128,290.50 and 34,241.76

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Solution

The fourth proportional to 85,548.78, 128,290.50 and 34,241.76 is: 51,349.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548.78 : 128,290.50 = 34,241.76 : x
  2. Step 2: Convert to fraction form
    85,548.78/128,290.50 = 34,241.76/x
  3. Step 3: Cross multiply
    85,548.78x = 128,290.50 × 34,241.76
  4. Step 4: Simplify right side
    85,548.78x = 4,392,892,511.28
  5. Step 5: Solve for x
    x = 4,392,892,511.28/85,548.78
  6. Step 6: Final answer
    x = 51,349.56

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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.