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Finding the Fourth Proportional to 51,009, 70,399.04 and 28,653

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Solution

The fourth proportional to 51,009, 70,399.04 and 28,653 is: 39,544.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,009 : 70,399.04 = 28,653 : x
  2. Step 2: Convert to fraction form
    51,009/70,399.04 = 28,653/x
  3. Step 3: Cross multiply
    51,009x = 70,399.04 × 28,653
  4. Step 4: Simplify right side
    51,009x = 2,017,143,693.12
  5. Step 5: Solve for x
    x = 2,017,143,693.12/51,009
  6. Step 6: Final answer
    x = 39,544.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.