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Finding the Fourth Proportional to 139,968,143.80, 209,952,215.70 and 88,907,817.40

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Solution

The fourth proportional to 139,968,143.80, 209,952,215.70 and 88,907,817.40 is: 133,361,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,143.80 : 209,952,215.70 = 88,907,817.40 : x
  2. Step 2: Convert to fraction form
    139,968,143.80/209,952,215.70 = 88,907,817.40/x
  3. Step 3: Cross multiply
    139,968,143.80x = 209,952,215.70 × 88,907,817.40
  4. Step 4: Simplify right side
    139,968,143.80x = 18,666,393,256,181,012
  5. Step 5: Solve for x
    x = 18,666,393,256,181,012/139,968,143.80
  6. Step 6: Final answer
    x = 133,361,726.10

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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.