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Finding the Fourth Proportional to 85,307.58, 127,919.25 and 26,128.98

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Solution

The fourth proportional to 85,307.58, 127,919.25 and 26,128.98 is: 39,180.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,307.58 : 127,919.25 = 26,128.98 : x
  2. Step 2: Convert to fraction form
    85,307.58/127,919.25 = 26,128.98/x
  3. Step 3: Cross multiply
    85,307.58x = 127,919.25 × 26,128.98
  4. Step 4: Simplify right side
    85,307.58x = 3,342,399,524.87
  5. Step 5: Solve for x
    x = 3,342,399,524.87/85,307.58
  6. Step 6: Final answer
    x = 39,180.57

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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.