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Finding the Fourth Proportional to 45,780.40, 68,713.80 and 28,284.40

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Solution

The fourth proportional to 45,780.40, 68,713.80 and 28,284.40 is: 42,453.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,780.40 : 68,713.80 = 28,284.40 : x
  2. Step 2: Convert to fraction form
    45,780.40/68,713.80 = 28,284.40/x
  3. Step 3: Cross multiply
    45,780.40x = 68,713.80 × 28,284.40
  4. Step 4: Simplify right side
    45,780.40x = 1,943,528,604.72
  5. Step 5: Solve for x
    x = 1,943,528,604.72/45,780.40
  6. Step 6: Final answer
    x = 42,453.29

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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.