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Finding the Fourth Proportional to 45,806.40, 68,752.80 and 28,310.40

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Solution

The fourth proportional to 45,806.40, 68,752.80 and 28,310.40 is: 42,492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,806.40 : 68,752.80 = 28,310.40 : x
  2. Step 2: Convert to fraction form
    45,806.40/68,752.80 = 28,310.40/x
  3. Step 3: Cross multiply
    45,806.40x = 68,752.80 × 28,310.40
  4. Step 4: Simplify right side
    45,806.40x = 1,946,419,269.12
  5. Step 5: Solve for x
    x = 1,946,419,269.12/45,806.40
  6. Step 6: Final answer
    x = 42,492.30

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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.