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Finding the Fourth Proportional to 85,777.52, 128,660.08 and 26,611.64

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Solution

The fourth proportional to 85,777.52, 128,660.08 and 26,611.64 is: 39,915.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,777.52 : 128,660.08 = 26,611.64 : x
  2. Step 2: Convert to fraction form
    85,777.52/128,660.08 = 26,611.64/x
  3. Step 3: Cross multiply
    85,777.52x = 128,660.08 × 26,611.64
  4. Step 4: Simplify right side
    85,777.52x = 3,423,855,731.33
  5. Step 5: Solve for x
    x = 3,423,855,731.33/85,777.52
  6. Step 6: Final answer
    x = 39,915.54

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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.