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Finding the Fourth Proportional to 257,880,493.80, 386,820,740.70 and 73,647,613.80

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Solution

The fourth proportional to 257,880,493.80, 386,820,740.70 and 73,647,613.80 is: 110,471,420.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,880,493.80 : 386,820,740.70 = 73,647,613.80 : x
  2. Step 2: Convert to fraction form
    257,880,493.80/386,820,740.70 = 73,647,613.80/x
  3. Step 3: Cross multiply
    257,880,493.80x = 386,820,740.70 × 73,647,613.80
  4. Step 4: Simplify right side
    257,880,493.80x = 28,488,424,520,903,540
  5. Step 5: Solve for x
    x = 28,488,424,520,903,540/257,880,493.80
  6. Step 6: Final answer
    x = 110,471,420.70

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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.