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Finding the Fourth Proportional to 71,289.86, 98,390.36 and 41,069.30

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Solution

The fourth proportional to 71,289.86, 98,390.36 and 41,069.30 is: 56,681.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,289.86 : 98,390.36 = 41,069.30 : x
  2. Step 2: Convert to fraction form
    71,289.86/98,390.36 = 41,069.30/x
  3. Step 3: Cross multiply
    71,289.86x = 98,390.36 × 41,069.30
  4. Step 4: Simplify right side
    71,289.86x = 4,040,822,822.67
  5. Step 5: Solve for x
    x = 4,040,822,822.67/71,289.86
  6. Step 6: Final answer
    x = 56,681.60

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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.