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Finding the Fourth Proportional to 115,215,103.80, 172,822,655.70 and 115,215,103.80

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Solution

The fourth proportional to 115,215,103.80, 172,822,655.70 and 115,215,103.80 is: 172,822,655.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,215,103.80 : 172,822,655.70 = 115,215,103.80 : x
  2. Step 2: Convert to fraction form
    115,215,103.80/172,822,655.70 = 115,215,103.80/x
  3. Step 3: Cross multiply
    115,215,103.80x = 172,822,655.70 × 115,215,103.80
  4. Step 4: Simplify right side
    115,215,103.80x = 19,911,780,215,467,160
  5. Step 5: Solve for x
    x = 19,911,780,215,467,160/115,215,103.80
  6. Step 6: Final answer
    x = 172,822,655.70

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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.