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Finding the Fourth Proportional to 139,968,017.80, 209,952,026.70 and 133,590,725.80

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Solution

The fourth proportional to 139,968,017.80, 209,952,026.70 and 133,590,725.80 is: 200,386,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,017.80 : 209,952,026.70 = 133,590,725.80 : x
  2. Step 2: Convert to fraction form
    139,968,017.80/209,952,026.70 = 133,590,725.80/x
  3. Step 3: Cross multiply
    139,968,017.80x = 209,952,026.70 × 133,590,725.80
  4. Step 4: Simplify right side
    139,968,017.80x = 28,047,643,630,033,976
  5. Step 5: Solve for x
    x = 28,047,643,630,033,976/139,968,017.80
  6. Step 6: Final answer
    x = 200,386,088.70

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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.