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Finding the Fourth Proportional to 201,208,598.70, 301,812,898.05 and 71,820,429.90

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Solution

The fourth proportional to 201,208,598.70, 301,812,898.05 and 71,820,429.90 is: 107,730,644.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,208,598.70 : 301,812,898.05 = 71,820,429.90 : x
  2. Step 2: Convert to fraction form
    201,208,598.70/301,812,898.05 = 71,820,429.90/x
  3. Step 3: Cross multiply
    201,208,598.70x = 301,812,898.05 × 71,820,429.90
  4. Step 4: Simplify right side
    201,208,598.70x = 21,676,332,087,315,876
  5. Step 5: Solve for x
    x = 21,676,332,087,315,876/201,208,598.70
  6. Step 6: Final answer
    x = 107,730,644.85

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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.