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Finding the Fourth Proportional to 105,480.87, 145,563.65 and 57,734.47

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Solution

The fourth proportional to 105,480.87, 145,563.65 and 57,734.47 is: 79,673.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,480.87 : 145,563.65 = 57,734.47 : x
  2. Step 2: Convert to fraction form
    105,480.87/145,563.65 = 57,734.47/x
  3. Step 3: Cross multiply
    105,480.87x = 145,563.65 × 57,734.47
  4. Step 4: Simplify right side
    105,480.87x = 8,404,040,184.02
  5. Step 5: Solve for x
    x = 8,404,040,184.02/105,480.87
  6. Step 6: Final answer
    x = 79,673.60

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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.