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Finding the Fourth Proportional to 311,072,486.52, 429,293,072.88 and 178,913,519.88

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Solution

The fourth proportional to 311,072,486.52, 429,293,072.88 and 178,913,519.88 is: 246,908,158.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,072,486.52 : 429,293,072.88 = 178,913,519.88 : x
  2. Step 2: Convert to fraction form
    311,072,486.52/429,293,072.88 = 178,913,519.88/x
  3. Step 3: Cross multiply
    311,072,486.52x = 429,293,072.88 × 178,913,519.88
  4. Step 4: Simplify right side
    311,072,486.52x = 76,806,334,729,062,160
  5. Step 5: Solve for x
    x = 76,806,334,729,062,160/311,072,486.52
  6. Step 6: Final answer
    x = 246,908,158.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.