Home / 219,361.83-328,995.21-128,116.25

Finding the Fourth Proportional to 219,361.83, 328,995.21 and 128,116.25

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Solution

The fourth proportional to 219,361.83, 328,995.21 and 128,116.25 is: 192,146.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,361.83 : 328,995.21 = 128,116.25 : x
  2. Step 2: Convert to fraction form
    219,361.83/328,995.21 = 128,116.25/x
  3. Step 3: Cross multiply
    219,361.83x = 328,995.21 × 128,116.25
  4. Step 4: Simplify right side
    219,361.83x = 42,149,630,928.19
  5. Step 5: Solve for x
    x = 42,149,630,928.19/219,361.83
  6. Step 6: Final answer
    x = 192,146.61

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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.