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Finding the Fourth Proportional to 206,687,279.40, 310,030,919.10 and 70,372,662.90

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Solution

The fourth proportional to 206,687,279.40, 310,030,919.10 and 70,372,662.90 is: 105,558,994.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,687,279.40 : 310,030,919.10 = 70,372,662.90 : x
  2. Step 2: Convert to fraction form
    206,687,279.40/310,030,919.10 = 70,372,662.90/x
  3. Step 3: Cross multiply
    206,687,279.40x = 310,030,919.10 × 70,372,662.90
  4. Step 4: Simplify right side
    206,687,279.40x = 21,817,701,358,401,476
  5. Step 5: Solve for x
    x = 21,817,701,358,401,476/206,687,279.40
  6. Step 6: Final answer
    x = 105,558,994.35

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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.