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Finding the Fourth Proportional to 104,279.90, 143,907 and 56,534

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Solution

The fourth proportional to 104,279.90, 143,907 and 56,534 is: 78,017.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,279.90 : 143,907 = 56,534 : x
  2. Step 2: Convert to fraction form
    104,279.90/143,907 = 56,534/x
  3. Step 3: Cross multiply
    104,279.90x = 143,907 × 56,534
  4. Step 4: Simplify right side
    104,279.90x = 8,135,638,338
  5. Step 5: Solve for x
    x = 8,135,638,338/104,279.90
  6. Step 6: Final answer
    x = 78,017.32

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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.