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Finding the Fourth Proportional to 85,696.40, 128,544.60 and 85,696.40

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Solution

The fourth proportional to 85,696.40, 128,544.60 and 85,696.40 is: 128,544.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,696.40 : 128,544.60 = 85,696.40 : x
  2. Step 2: Convert to fraction form
    85,696.40/128,544.60 = 85,696.40/x
  3. Step 3: Cross multiply
    85,696.40x = 128,544.60 × 85,696.40
  4. Step 4: Simplify right side
    85,696.40x = 11,015,809,459.44
  5. Step 5: Solve for x
    x = 11,015,809,459.44/85,696.40
  6. Step 6: Final answer
    x = 128,544.60

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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.