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Finding the Fourth Proportional to 68,241,978.90, 102,362,968.35 and 45,283,727.70

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Solution

The fourth proportional to 68,241,978.90, 102,362,968.35 and 45,283,727.70 is: 67,925,591.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,241,978.90 : 102,362,968.35 = 45,283,727.70 : x
  2. Step 2: Convert to fraction form
    68,241,978.90/102,362,968.35 = 45,283,727.70/x
  3. Step 3: Cross multiply
    68,241,978.90x = 102,362,968.35 × 45,283,727.70
  4. Step 4: Simplify right side
    68,241,978.90x = 4,635,376,785,325,118
  5. Step 5: Solve for x
    x = 4,635,376,785,325,118/68,241,978.90
  6. Step 6: Final answer
    x = 67,925,591.55

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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.