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Finding the Fourth Proportional to 105,689.15, 145,850.99 and 57,941.47

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Solution

The fourth proportional to 105,689.15, 145,850.99 and 57,941.47 is: 79,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,689.15 : 145,850.99 = 57,941.47 : x
  2. Step 2: Convert to fraction form
    105,689.15/145,850.99 = 57,941.47/x
  3. Step 3: Cross multiply
    105,689.15x = 145,850.99 × 57,941.47
  4. Step 4: Simplify right side
    105,689.15x = 8,450,820,107.22
  5. Step 5: Solve for x
    x = 8,450,820,107.22/105,689.15
  6. Step 6: Final answer
    x = 79,959.21

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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.