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Finding the Fourth Proportional to 50,779.46, 70,074.78 and 28,118

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Solution

The fourth proportional to 50,779.46, 70,074.78 and 28,118 is: 38,802.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,779.46 : 70,074.78 = 28,118 : x
  2. Step 2: Convert to fraction form
    50,779.46/70,074.78 = 28,118/x
  3. Step 3: Cross multiply
    50,779.46x = 70,074.78 × 28,118
  4. Step 4: Simplify right side
    50,779.46x = 1,970,362,664.04
  5. Step 5: Solve for x
    x = 1,970,362,664.04/50,779.46
  6. Step 6: Final answer
    x = 38,802.36

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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.