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Finding the Fourth Proportional to 139,968,295.20, 209,952,442.80 and 125,859,520.80

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Solution

The fourth proportional to 139,968,295.20, 209,952,442.80 and 125,859,520.80 is: 188,789,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,295.20 : 209,952,442.80 = 125,859,520.80 : x
  2. Step 2: Convert to fraction form
    139,968,295.20/209,952,442.80 = 125,859,520.80/x
  3. Step 3: Cross multiply
    139,968,295.20x = 209,952,442.80 × 125,859,520.80
  4. Step 4: Simplify right side
    139,968,295.20x = 26,424,513,841,597,412
  5. Step 5: Solve for x
    x = 26,424,513,841,597,412/139,968,295.20
  6. Step 6: Final answer
    x = 188,789,281.20

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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.