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Finding the Fourth Proportional to 268,661,728.80, 403,021,392.48 and 74,573,966.88

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Solution

The fourth proportional to 268,661,728.80, 403,021,392.48 and 74,573,966.88 is: 111,868,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,661,728.80 : 403,021,392.48 = 74,573,966.88 : x
  2. Step 2: Convert to fraction form
    268,661,728.80/403,021,392.48 = 74,573,966.88/x
  3. Step 3: Cross multiply
    268,661,728.80x = 403,021,392.48 × 74,573,966.88
  4. Step 4: Simplify right side
    268,661,728.80x = 30,054,903,974,735,000
  5. Step 5: Solve for x
    x = 30,054,903,974,735,000/268,661,728.80
  6. Step 6: Final answer
    x = 111,868,944.30

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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.