Home / 85,731.81-128,576.95-35,784.84

Finding the Fourth Proportional to 85,731.81, 128,576.95 and 35,784.84

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Solution

The fourth proportional to 85,731.81, 128,576.95 and 35,784.84 is: 53,668.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,731.81 : 128,576.95 = 35,784.84 : x
  2. Step 2: Convert to fraction form
    85,731.81/128,576.95 = 35,784.84/x
  3. Step 3: Cross multiply
    85,731.81x = 128,576.95 × 35,784.84
  4. Step 4: Simplify right side
    85,731.81x = 4,601,105,583.44
  5. Step 5: Solve for x
    x = 4,601,105,583.44/85,731.81
  6. Step 6: Final answer
    x = 53,668.59

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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.