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Finding the Fourth Proportional to 85,698.68, 128,569.75 and 25,726.82

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Solution

The fourth proportional to 85,698.68, 128,569.75 and 25,726.82 is: 38,596.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698.68 : 128,569.75 = 25,726.82 : x
  2. Step 2: Convert to fraction form
    85,698.68/128,569.75 = 25,726.82/x
  3. Step 3: Cross multiply
    85,698.68x = 128,569.75 × 25,726.82
  4. Step 4: Simplify right side
    85,698.68x = 3,307,690,108.53
  5. Step 5: Solve for x
    x = 3,307,690,108.53/85,698.68
  6. Step 6: Final answer
    x = 38,596.75

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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.