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Finding the Fourth Proportional to 71,542,668.80, 107,349,432.60 and 40,860,808.40

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Solution

The fourth proportional to 71,542,668.80, 107,349,432.60 and 40,860,808.40 is: 61,311,447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,542,668.80 : 107,349,432.60 = 40,860,808.40 : x
  2. Step 2: Convert to fraction form
    71,542,668.80/107,349,432.60 = 40,860,808.40/x
  3. Step 3: Cross multiply
    71,542,668.80x = 107,349,432.60 × 40,860,808.40
  4. Step 4: Simplify right side
    71,542,668.80x = 4,386,384,597,317,313.50
  5. Step 5: Solve for x
    x = 4,386,384,597,317,313.50/71,542,668.80
  6. Step 6: Final answer
    x = 61,311,447.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.