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Finding the Fourth Proportional to 80,879,270.10, 121,318,905.15 and 80,879,270.10

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Solution

The fourth proportional to 80,879,270.10, 121,318,905.15 and 80,879,270.10 is: 121,318,905.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,879,270.10 : 121,318,905.15 = 80,879,270.10 : x
  2. Step 2: Convert to fraction form
    80,879,270.10/121,318,905.15 = 80,879,270.10/x
  3. Step 3: Cross multiply
    80,879,270.10x = 121,318,905.15 × 80,879,270.10
  4. Step 4: Simplify right side
    80,879,270.10x = 9,812,184,497,863,130
  5. Step 5: Solve for x
    x = 9,812,184,497,863,130/80,879,270.10
  6. Step 6: Final answer
    x = 121,318,905.15

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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.