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Finding the Fourth Proportional to 7,199,981.20, 10,771,978.20 and 4,680,557.20

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Solution

The fourth proportional to 7,199,981.20, 10,771,978.20 and 4,680,557.20 is: 7,002,637.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,199,981.20 : 10,771,978.20 = 4,680,557.20 : x
  2. Step 2: Convert to fraction form
    7,199,981.20/10,771,978.20 = 4,680,557.20/x
  3. Step 3: Cross multiply
    7,199,981.20x = 10,771,978.20 × 4,680,557.20
  4. Step 4: Simplify right side
    7,199,981.20x = 50,418,860,122,253.04
  5. Step 5: Solve for x
    x = 50,418,860,122,253.04/7,199,981.20
  6. Step 6: Final answer
    x = 7,002,637.75

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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.