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Finding the Fourth Proportional to 47,289.80, 70,809.55 and 28,544.78

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Solution

The fourth proportional to 47,289.80, 70,809.55 and 28,544.78 is: 42,741.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,289.80 : 70,809.55 = 28,544.78 : x
  2. Step 2: Convert to fraction form
    47,289.80/70,809.55 = 28,544.78/x
  3. Step 3: Cross multiply
    47,289.80x = 70,809.55 × 28,544.78
  4. Step 4: Simplify right side
    47,289.80x = 2,021,242,601.24
  5. Step 5: Solve for x
    x = 2,021,242,601.24/47,289.80
  6. Step 6: Final answer
    x = 42,741.62

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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.