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Finding the Fourth Proportional to 211,412,087.20, 317,118,130.80 and 211,412,087.20

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Solution

The fourth proportional to 211,412,087.20, 317,118,130.80 and 211,412,087.20 is: 317,118,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,412,087.20 : 317,118,130.80 = 211,412,087.20 : x
  2. Step 2: Convert to fraction form
    211,412,087.20/317,118,130.80 = 211,412,087.20/x
  3. Step 3: Cross multiply
    211,412,087.20x = 317,118,130.80 × 211,412,087.20
  4. Step 4: Simplify right side
    211,412,087.20x = 67,042,605,921,390,608
  5. Step 5: Solve for x
    x = 67,042,605,921,390,608/211,412,087.20
  6. Step 6: Final answer
    x = 317,118,130.80

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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.