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Finding the Fourth Proportional to 56,167,988.20, 78,741,351.80 and 56,167,988.20

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Solution

The fourth proportional to 56,167,988.20, 78,741,351.80 and 56,167,988.20 is: 78,741,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,167,988.20 : 78,741,351.80 = 56,167,988.20 : x
  2. Step 2: Convert to fraction form
    56,167,988.20/78,741,351.80 = 56,167,988.20/x
  3. Step 3: Cross multiply
    56,167,988.20x = 78,741,351.80 × 56,167,988.20
  4. Step 4: Simplify right side
    56,167,988.20x = 4,422,743,318,754,449
  5. Step 5: Solve for x
    x = 4,422,743,318,754,449/56,167,988.20
  6. Step 6: Final answer
    x = 78,741,351.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.