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Finding the Fourth Proportional to 139,969,208.20, 209,953,812.30 and 42,939,891.40

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Solution

The fourth proportional to 139,969,208.20, 209,953,812.30 and 42,939,891.40 is: 64,409,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,208.20 : 209,953,812.30 = 42,939,891.40 : x
  2. Step 2: Convert to fraction form
    139,969,208.20/209,953,812.30 = 42,939,891.40/x
  3. Step 3: Cross multiply
    139,969,208.20x = 209,953,812.30 × 42,939,891.40
  4. Step 4: Simplify right side
    139,969,208.20x = 9,015,393,899,177,984
  5. Step 5: Solve for x
    x = 9,015,393,899,177,984/139,969,208.20
  6. Step 6: Final answer
    x = 64,409,837.10

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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.