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Finding the Fourth Proportional to 155,892,937.80, 218,608,431 and 155,892,937.80

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Solution

The fourth proportional to 155,892,937.80, 218,608,431 and 155,892,937.80 is: 218,608,431

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,892,937.80 : 218,608,431 = 155,892,937.80 : x
  2. Step 2: Convert to fraction form
    155,892,937.80/218,608,431 = 155,892,937.80/x
  3. Step 3: Cross multiply
    155,892,937.80x = 218,608,431 × 155,892,937.80
  4. Step 4: Simplify right side
    155,892,937.80x = 34,079,510,536,438,596
  5. Step 5: Solve for x
    x = 34,079,510,536,438,596/155,892,937.80
  6. Step 6: Final answer
    x = 218,608,431

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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.