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Finding the Fourth Proportional to 104,287.78, 143,916.51 and 56,540.98

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Solution

The fourth proportional to 104,287.78, 143,916.51 and 56,540.98 is: 78,026.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,287.78 : 143,916.51 = 56,540.98 : x
  2. Step 2: Convert to fraction form
    104,287.78/143,916.51 = 56,540.98/x
  3. Step 3: Cross multiply
    104,287.78x = 143,916.51 × 56,540.98
  4. Step 4: Simplify right side
    104,287.78x = 8,137,180,513.58
  5. Step 5: Solve for x
    x = 8,137,180,513.58/104,287.78
  6. Step 6: Final answer
    x = 78,026.21

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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.