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Finding the Fourth Proportional to 45,905.70, 68,858.55 and 19,661.70

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Solution

The fourth proportional to 45,905.70, 68,858.55 and 19,661.70 is: 29,492.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,905.70 : 68,858.55 = 19,661.70 : x
  2. Step 2: Convert to fraction form
    45,905.70/68,858.55 = 19,661.70/x
  3. Step 3: Cross multiply
    45,905.70x = 68,858.55 × 19,661.70
  4. Step 4: Simplify right side
    45,905.70x = 1,353,876,152.54
  5. Step 5: Solve for x
    x = 1,353,876,152.54/45,905.70
  6. Step 6: Final answer
    x = 29,492.55

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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.