Home / 85,511.94-128,270.10-40,522.74

Finding the Fourth Proportional to 85,511.94, 128,270.10 and 40,522.74

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Solution

The fourth proportional to 85,511.94, 128,270.10 and 40,522.74 is: 60,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,511.94 : 128,270.10 = 40,522.74 : x
  2. Step 2: Convert to fraction form
    85,511.94/128,270.10 = 40,522.74/x
  3. Step 3: Cross multiply
    85,511.94x = 128,270.10 × 40,522.74
  4. Step 4: Simplify right side
    85,511.94x = 5,197,855,912.07
  5. Step 5: Solve for x
    x = 5,197,855,912.07/85,511.94
  6. Step 6: Final answer
    x = 60,785.15

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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.