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Finding the Fourth Proportional to 139,968,005.20, 209,952,007.80 and 125,859,230.80

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Solution

The fourth proportional to 139,968,005.20, 209,952,007.80 and 125,859,230.80 is: 188,788,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,005.20 : 209,952,007.80 = 125,859,230.80 : x
  2. Step 2: Convert to fraction form
    139,968,005.20/209,952,007.80 = 125,859,230.80/x
  3. Step 3: Cross multiply
    139,968,005.20x = 209,952,007.80 × 125,859,230.80
  4. Step 4: Simplify right side
    139,968,005.20x = 26,424,398,206,623,600
  5. Step 5: Solve for x
    x = 26,424,398,206,623,600/139,968,005.20
  6. Step 6: Final answer
    x = 188,788,846.20

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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.