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Finding the Fourth Proportional to 85,851.46, 128,751 and 59,367.70

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Solution

The fourth proportional to 85,851.46, 128,751 and 59,367.70 is: 89,033.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,851.46 : 128,751 = 59,367.70 : x
  2. Step 2: Convert to fraction form
    85,851.46/128,751 = 59,367.70/x
  3. Step 3: Cross multiply
    85,851.46x = 128,751 × 59,367.70
  4. Step 4: Simplify right side
    85,851.46x = 7,643,650,742.70
  5. Step 5: Solve for x
    x = 7,643,650,742.70/85,851.46
  6. Step 6: Final answer
    x = 89,033.44

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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.