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Finding the Fourth Proportional to 45,510.78, 68,260.71 and 19,212.12

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Solution

The fourth proportional to 45,510.78, 68,260.71 and 19,212.12 is: 28,815.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,510.78 : 68,260.71 = 19,212.12 : x
  2. Step 2: Convert to fraction form
    45,510.78/68,260.71 = 19,212.12/x
  3. Step 3: Cross multiply
    45,510.78x = 68,260.71 × 19,212.12
  4. Step 4: Simplify right side
    45,510.78x = 1,311,432,951.81
  5. Step 5: Solve for x
    x = 1,311,432,951.81/45,510.78
  6. Step 6: Final answer
    x = 28,815.88

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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.