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Finding the Fourth Proportional to 139,968,597.60, 209,952,896.40 and 111,058,207.20

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Solution

The fourth proportional to 139,968,597.60, 209,952,896.40 and 111,058,207.20 is: 166,587,310.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,597.60 : 209,952,896.40 = 111,058,207.20 : x
  2. Step 2: Convert to fraction form
    139,968,597.60/209,952,896.40 = 111,058,207.20/x
  3. Step 3: Cross multiply
    139,968,597.60x = 209,952,896.40 × 111,058,207.20
  4. Step 4: Simplify right side
    139,968,597.60x = 23,316,992,270,631,336
  5. Step 5: Solve for x
    x = 23,316,992,270,631,336/139,968,597.60
  6. Step 6: Final answer
    x = 166,587,310.80

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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.