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Finding the Fourth Proportional to 85,530.64, 128,307.84 and 26,370.96

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Solution

The fourth proportional to 85,530.64, 128,307.84 and 26,370.96 is: 39,560.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,530.64 : 128,307.84 = 26,370.96 : x
  2. Step 2: Convert to fraction form
    85,530.64/128,307.84 = 26,370.96/x
  3. Step 3: Cross multiply
    85,530.64x = 128,307.84 × 26,370.96
  4. Step 4: Simplify right side
    85,530.64x = 3,383,600,916.33
  5. Step 5: Solve for x
    x = 3,383,600,916.33/85,530.64
  6. Step 6: Final answer
    x = 39,560.10

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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.