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Finding the Fourth Proportional to 215,121.60, 322,682.40 and 74,781.60

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Solution

The fourth proportional to 215,121.60, 322,682.40 and 74,781.60 is: 112,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,121.60 : 322,682.40 = 74,781.60 : x
  2. Step 2: Convert to fraction form
    215,121.60/322,682.40 = 74,781.60/x
  3. Step 3: Cross multiply
    215,121.60x = 322,682.40 × 74,781.60
  4. Step 4: Simplify right side
    215,121.60x = 24,130,706,163.84
  5. Step 5: Solve for x
    x = 24,130,706,163.84/215,121.60
  6. Step 6: Final answer
    x = 112,172.40

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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.