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Finding the Fourth Proportional to 71,290.61, 98,391.40 and 41,070.05

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Solution

The fourth proportional to 71,290.61, 98,391.40 and 41,070.05 is: 56,682.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,290.61 : 98,391.40 = 41,070.05 : x
  2. Step 2: Convert to fraction form
    71,290.61/98,391.40 = 41,070.05/x
  3. Step 3: Cross multiply
    71,290.61x = 98,391.40 × 41,070.05
  4. Step 4: Simplify right side
    71,290.61x = 4,040,939,122.94
  5. Step 5: Solve for x
    x = 4,040,939,122.94/71,290.61
  6. Step 6: Final answer
    x = 56,682.63

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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.