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Finding the Fourth Proportional to 216,128.95, 324,235.44 and 82,999.42

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Solution

The fourth proportional to 216,128.95, 324,235.44 and 82,999.42 is: 124,515.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,128.95 : 324,235.44 = 82,999.42 : x
  2. Step 2: Convert to fraction form
    216,128.95/324,235.44 = 82,999.42/x
  3. Step 3: Cross multiply
    216,128.95x = 324,235.44 × 82,999.42
  4. Step 4: Simplify right side
    216,128.95x = 26,911,352,652.86
  5. Step 5: Solve for x
    x = 26,911,352,652.86/216,128.95
  6. Step 6: Final answer
    x = 124,515.26

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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.