Home / 128,120.28-192,297.62-64,984

Finding the Fourth Proportional to 128,120.28, 192,297.62 and 64,984

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Solution

The fourth proportional to 128,120.28, 192,297.62 and 64,984 is: 97,535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,120.28 : 192,297.62 = 64,984 : x
  2. Step 2: Convert to fraction form
    128,120.28/192,297.62 = 64,984/x
  3. Step 3: Cross multiply
    128,120.28x = 192,297.62 × 64,984
  4. Step 4: Simplify right side
    128,120.28x = 12,496,268,538.08
  5. Step 5: Solve for x
    x = 12,496,268,538.08/128,120.28
  6. Step 6: Final answer
    x = 97,535.45

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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.