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Finding the Fourth Proportional to 254,005.81, 380,741.97 and 85,467.63

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Solution

The fourth proportional to 254,005.81, 380,741.97 and 85,467.63 is: 128,111.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,005.81 : 380,741.97 = 85,467.63 : x
  2. Step 2: Convert to fraction form
    254,005.81/380,741.97 = 85,467.63/x
  3. Step 3: Cross multiply
    254,005.81x = 380,741.97 × 85,467.63
  4. Step 4: Simplify right side
    254,005.81x = 32,541,113,817.43
  5. Step 5: Solve for x
    x = 32,541,113,817.43/254,005.81
  6. Step 6: Final answer
    x = 128,111.69

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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.