Home / 139,968,003.70-209,952,005.55-86,145,642.10

Finding the Fourth Proportional to 139,968,003.70, 209,952,005.55 and 86,145,642.10

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Solution

The fourth proportional to 139,968,003.70, 209,952,005.55 and 86,145,642.10 is: 129,218,463.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,003.70 : 209,952,005.55 = 86,145,642.10 : x
  2. Step 2: Convert to fraction form
    139,968,003.70/209,952,005.55 = 86,145,642.10/x
  3. Step 3: Cross multiply
    139,968,003.70x = 209,952,005.55 × 86,145,642.10
  4. Step 4: Simplify right side
    139,968,003.70x = 18,086,450,328,287,512
  5. Step 5: Solve for x
    x = 18,086,450,328,287,512/139,968,003.70
  6. Step 6: Final answer
    x = 129,218,463.15

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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.