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Finding the Fourth Proportional to 85,800,631.45, 128,700,947.18 and 85,800,631.45

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Solution

The fourth proportional to 85,800,631.45, 128,700,947.18 and 85,800,631.45 is: 128,700,947.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800,631.45 : 128,700,947.18 = 85,800,631.45 : x
  2. Step 2: Convert to fraction form
    85,800,631.45/128,700,947.18 = 85,800,631.45/x
  3. Step 3: Cross multiply
    85,800,631.45x = 128,700,947.18 × 85,800,631.45
  4. Step 4: Simplify right side
    85,800,631.45x = 11,042,622,536,257,098
  5. Step 5: Solve for x
    x = 11,042,622,536,257,098/85,800,631.45
  6. Step 6: Final answer
    x = 128,700,947.18

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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.