Home / 254,558.40-381,837.60-128,587.20

Finding the Fourth Proportional to 254,558.40, 381,837.60 and 128,587.20

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Solution

The fourth proportional to 254,558.40, 381,837.60 and 128,587.20 is: 192,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,558.40 : 381,837.60 = 128,587.20 : x
  2. Step 2: Convert to fraction form
    254,558.40/381,837.60 = 128,587.20/x
  3. Step 3: Cross multiply
    254,558.40x = 381,837.60 × 128,587.20
  4. Step 4: Simplify right side
    254,558.40x = 49,099,427,838.72
  5. Step 5: Solve for x
    x = 49,099,427,838.72/254,558.40
  6. Step 6: Final answer
    x = 192,880.80

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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.