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Finding the Fourth Proportional to 139,967,998.40, 209,852,464.80 and 53,673,060.80

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Solution

The fourth proportional to 139,967,998.40, 209,852,464.80 and 53,673,060.80 is: 80,471,423.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,967,998.40 : 209,852,464.80 = 53,673,060.80 : x
  2. Step 2: Convert to fraction form
    139,967,998.40/209,852,464.80 = 53,673,060.80/x
  3. Step 3: Cross multiply
    139,967,998.40x = 209,852,464.80 × 53,673,060.80
  4. Step 4: Simplify right side
    139,967,998.40x = 11,263,424,102,240,260
  5. Step 5: Solve for x
    x = 11,263,424,102,240,260/139,967,998.40
  6. Step 6: Final answer
    x = 80,471,423.69

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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.