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Finding the Fourth Proportional to 66,851.79, 100,255.81 and 31,302.10

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Solution

The fourth proportional to 66,851.79, 100,255.81 and 31,302.10 is: 46,942.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,851.79 : 100,255.81 = 31,302.10 : x
  2. Step 2: Convert to fraction form
    66,851.79/100,255.81 = 31,302.10/x
  3. Step 3: Cross multiply
    66,851.79x = 100,255.81 × 31,302.10
  4. Step 4: Simplify right side
    66,851.79x = 3,138,217,390.20
  5. Step 5: Solve for x
    x = 3,138,217,390.20/66,851.79
  6. Step 6: Final answer
    x = 46,942.91

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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.