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Finding the Fourth Proportional to 139,968,295.20, 209,952,442.80 and 123,812,488.80

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Solution

The fourth proportional to 139,968,295.20, 209,952,442.80 and 123,812,488.80 is: 185,718,733.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,295.20 : 209,952,442.80 = 123,812,488.80 : x
  2. Step 2: Convert to fraction form
    139,968,295.20/209,952,442.80 = 123,812,488.80/x
  3. Step 3: Cross multiply
    139,968,295.20x = 209,952,442.80 × 123,812,488.80
  4. Step 4: Simplify right side
    139,968,295.20x = 25,994,734,472,707,640
  5. Step 5: Solve for x
    x = 25,994,734,472,707,640/139,968,295.20
  6. Step 6: Final answer
    x = 185,718,733.20

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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.