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Finding the Fourth Proportional to 139,968,148.80, 209,952,223.20 and 117,293,332.80

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Solution

The fourth proportional to 139,968,148.80, 209,952,223.20 and 117,293,332.80 is: 175,939,999.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,148.80 : 209,952,223.20 = 117,293,332.80 : x
  2. Step 2: Convert to fraction form
    139,968,148.80/209,952,223.20 = 117,293,332.80/x
  3. Step 3: Cross multiply
    139,968,148.80x = 209,952,223.20 × 117,293,332.80
  4. Step 4: Simplify right side
    139,968,148.80x = 24,625,995,987,897,480
  5. Step 5: Solve for x
    x = 24,625,995,987,897,480/139,968,148.80
  6. Step 6: Final answer
    x = 175,939,999.20

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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.