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Finding the Fourth Proportional to 71,891,346.80, 107,837,020.20 and 68,532,114.80

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Solution

The fourth proportional to 71,891,346.80, 107,837,020.20 and 68,532,114.80 is: 102,798,172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,891,346.80 : 107,837,020.20 = 68,532,114.80 : x
  2. Step 2: Convert to fraction form
    71,891,346.80/107,837,020.20 = 68,532,114.80/x
  3. Step 3: Cross multiply
    71,891,346.80x = 107,837,020.20 × 68,532,114.80
  4. Step 4: Simplify right side
    71,891,346.80x = 7,390,299,048,036,319
  5. Step 5: Solve for x
    x = 7,390,299,048,036,319/71,891,346.80
  6. Step 6: Final answer
    x = 102,798,172.20

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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.