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Finding the Fourth Proportional to 139,968,013.80, 209,952,020.70 and 88,907,687.40

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Solution

The fourth proportional to 139,968,013.80, 209,952,020.70 and 88,907,687.40 is: 133,361,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,013.80 : 209,952,020.70 = 88,907,687.40 : x
  2. Step 2: Convert to fraction form
    139,968,013.80/209,952,020.70 = 88,907,687.40/x
  3. Step 3: Cross multiply
    139,968,013.80x = 209,952,020.70 × 88,907,687.40
  4. Step 4: Simplify right side
    139,968,013.80x = 18,666,348,625,393,928
  5. Step 5: Solve for x
    x = 18,666,348,625,393,928/139,968,013.80
  6. Step 6: Final answer
    x = 133,361,531.10

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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.