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Finding the Fourth Proportional to 70,788.13, 106,219.06 and 28,699.31

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Solution

The fourth proportional to 70,788.13, 106,219.06 and 28,699.31 is: 43,063.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,788.13 : 106,219.06 = 28,699.31 : x
  2. Step 2: Convert to fraction form
    70,788.13/106,219.06 = 28,699.31/x
  3. Step 3: Cross multiply
    70,788.13x = 106,219.06 × 28,699.31
  4. Step 4: Simplify right side
    70,788.13x = 3,048,413,924.65
  5. Step 5: Solve for x
    x = 3,048,413,924.65/70,788.13
  6. Step 6: Final answer
    x = 43,063.92

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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.