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Finding the Fourth Proportional to 68,725.70, 103,088.56 and 18,803.78

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Solution

The fourth proportional to 68,725.70, 103,088.56 and 18,803.78 is: 28,205.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,725.70 : 103,088.56 = 18,803.78 : x
  2. Step 2: Convert to fraction form
    68,725.70/103,088.56 = 18,803.78/x
  3. Step 3: Cross multiply
    68,725.70x = 103,088.56 × 18,803.78
  4. Step 4: Simplify right side
    68,725.70x = 1,938,454,602.76
  5. Step 5: Solve for x
    x = 1,938,454,602.76/68,725.70
  6. Step 6: Final answer
    x = 28,205.67

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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.