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Finding the Fourth Proportional to 139,968,173.80, 209,952,260.70 and 49,058,957.80

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Solution

The fourth proportional to 139,968,173.80, 209,952,260.70 and 49,058,957.80 is: 73,588,436.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,173.80 : 209,952,260.70 = 49,058,957.80 : x
  2. Step 2: Convert to fraction form
    139,968,173.80/209,952,260.70 = 49,058,957.80/x
  3. Step 3: Cross multiply
    139,968,173.80x = 209,952,260.70 × 49,058,957.80
  4. Step 4: Simplify right side
    139,968,173.80x = 10,300,039,097,695,898
  5. Step 5: Solve for x
    x = 10,300,039,097,695,898/139,968,173.80
  6. Step 6: Final answer
    x = 73,588,436.70

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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.