Home / 85,983.78-128,975.57-56,394.69

Finding the Fourth Proportional to 85,983.78, 128,975.57 and 56,394.69

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Solution

The fourth proportional to 85,983.78, 128,975.57 and 56,394.69 is: 84,591.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,983.78 : 128,975.57 = 56,394.69 : x
  2. Step 2: Convert to fraction form
    85,983.78/128,975.57 = 56,394.69/x
  3. Step 3: Cross multiply
    85,983.78x = 128,975.57 × 56,394.69
  4. Step 4: Simplify right side
    85,983.78x = 7,273,537,287.72
  5. Step 5: Solve for x
    x = 7,273,537,287.72/85,983.78
  6. Step 6: Final answer
    x = 84,591.97

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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.