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Finding the Fourth Proportional to 85,698.40, 128,547.60 and 35,761.90

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Solution

The fourth proportional to 85,698.40, 128,547.60 and 35,761.90 is: 53,642.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698.40 : 128,547.60 = 35,761.90 : x
  2. Step 2: Convert to fraction form
    85,698.40/128,547.60 = 35,761.90/x
  3. Step 3: Cross multiply
    85,698.40x = 128,547.60 × 35,761.90
  4. Step 4: Simplify right side
    85,698.40x = 4,597,106,416.44
  5. Step 5: Solve for x
    x = 4,597,106,416.44/85,698.40
  6. Step 6: Final answer
    x = 53,642.85

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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.