Home / 86,579.70-129,869.55-85,413.30

Finding the Fourth Proportional to 86,579.70, 129,869.55 and 85,413.30

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Solution

The fourth proportional to 86,579.70, 129,869.55 and 85,413.30 is: 128,119.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.70 : 129,869.55 = 85,413.30 : x
  2. Step 2: Convert to fraction form
    86,579.70/129,869.55 = 85,413.30/x
  3. Step 3: Cross multiply
    86,579.70x = 129,869.55 × 85,413.30
  4. Step 4: Simplify right side
    86,579.70x = 11,092,586,835.02
  5. Step 5: Solve for x
    x = 11,092,586,835.02/86,579.70
  6. Step 6: Final answer
    x = 128,119.95

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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.