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Finding the Fourth Proportional to 104,080.78, 143,638.41 and 58,742.66

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Solution

The fourth proportional to 104,080.78, 143,638.41 and 58,742.66 is: 81,068.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,080.78 : 143,638.41 = 58,742.66 : x
  2. Step 2: Convert to fraction form
    104,080.78/143,638.41 = 58,742.66/x
  3. Step 3: Cross multiply
    104,080.78x = 143,638.41 × 58,742.66
  4. Step 4: Simplify right side
    104,080.78x = 8,437,702,281.57
  5. Step 5: Solve for x
    x = 8,437,702,281.57/104,080.78
  6. Step 6: Final answer
    x = 81,068.78

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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.