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Finding the Fourth Proportional to 199,975,306.80, 299,291,113.80 and 139,509,130.80

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Solution

The fourth proportional to 199,975,306.80, 299,291,113.80 and 139,509,130.80 is: 208,794,994.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,975,306.80 : 299,291,113.80 = 139,509,130.80 : x
  2. Step 2: Convert to fraction form
    199,975,306.80/299,291,113.80 = 139,509,130.80/x
  3. Step 3: Cross multiply
    199,975,306.80x = 299,291,113.80 × 139,509,130.80
  4. Step 4: Simplify right side
    199,975,306.80x = 41,753,843,142,401,888
  5. Step 5: Solve for x
    x = 41,753,843,142,401,888/199,975,306.80
  6. Step 6: Final answer
    x = 208,794,994.79

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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.