Home / 85,106.08-117,515.28-54,906.40

Finding the Fourth Proportional to 85,106.08, 117,515.28 and 54,906.40

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Solution

The fourth proportional to 85,106.08, 117,515.28 and 54,906.40 is: 75,815.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,106.08 : 117,515.28 = 54,906.40 : x
  2. Step 2: Convert to fraction form
    85,106.08/117,515.28 = 54,906.40/x
  3. Step 3: Cross multiply
    85,106.08x = 117,515.28 × 54,906.40
  4. Step 4: Simplify right side
    85,106.08x = 6,452,340,969.79
  5. Step 5: Solve for x
    x = 6,452,340,969.79/85,106.08
  6. Step 6: Final answer
    x = 75,815.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.