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Finding the Fourth Proportional to 215,409.35, 323,160.64 and 65,645.69

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Solution

The fourth proportional to 215,409.35, 323,160.64 and 65,645.69 is: 98,482.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,409.35 : 323,160.64 = 65,645.69 : x
  2. Step 2: Convert to fraction form
    215,409.35/323,160.64 = 65,645.69/x
  3. Step 3: Cross multiply
    215,409.35x = 323,160.64 × 65,645.69
  4. Step 4: Simplify right side
    215,409.35x = 21,214,101,413.72
  5. Step 5: Solve for x
    x = 21,214,101,413.72/215,409.35
  6. Step 6: Final answer
    x = 98,482.73

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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.