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Finding the Fourth Proportional to 30,376.40, 45,564.60 and 28,043.60

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Solution

The fourth proportional to 30,376.40, 45,564.60 and 28,043.60 is: 42,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,376.40 : 45,564.60 = 28,043.60 : x
  2. Step 2: Convert to fraction form
    30,376.40/45,564.60 = 28,043.60/x
  3. Step 3: Cross multiply
    30,376.40x = 45,564.60 × 28,043.60
  4. Step 4: Simplify right side
    30,376.40x = 1,277,795,416.56
  5. Step 5: Solve for x
    x = 1,277,795,416.56/30,376.40
  6. Step 6: Final answer
    x = 42,065.40

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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.