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Finding the Fourth Proportional to 1,211,721,000.05, 1,817,581,500.08 and 1,211,721,000.05

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Solution

The fourth proportional to 1,211,721,000.05, 1,817,581,500.08 and 1,211,721,000.05 is: 1,817,581,500.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,721,000.05 : 1,817,581,500.08 = 1,211,721,000.05 : x
  2. Step 2: Convert to fraction form
    1,211,721,000.05/1,817,581,500.08 = 1,211,721,000.05/x
  3. Step 3: Cross multiply
    1,211,721,000.05x = 1,817,581,500.08 × 1,211,721,000.05
  4. Step 4: Simplify right side
    1,211,721,000.05x = 2,202,401,672,943,258,112
  5. Step 5: Solve for x
    x = 2,202,401,672,943,258,112/1,211,721,000.05
  6. Step 6: Final answer
    x = 1,817,581,500.08

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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.