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Finding the Fourth Proportional to 28,978,051.90, 43,467,077.85 and 13,861,507.90

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Solution

The fourth proportional to 28,978,051.90, 43,467,077.85 and 13,861,507.90 is: 20,792,261.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,051.90 : 43,467,077.85 = 13,861,507.90 : x
  2. Step 2: Convert to fraction form
    28,978,051.90/43,467,077.85 = 13,861,507.90/x
  3. Step 3: Cross multiply
    28,978,051.90x = 43,467,077.85 × 13,861,507.90
  4. Step 4: Simplify right side
    28,978,051.90x = 602,519,243,007,690
  5. Step 5: Solve for x
    x = 602,519,243,007,690/28,978,051.90
  6. Step 6: Final answer
    x = 20,792,261.85

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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.