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Finding the Fourth Proportional to 296,988,724.30, 445,431,713.52 and 78,642,203.44

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Solution

The fourth proportional to 296,988,724.30, 445,431,713.52 and 78,642,203.44 is: 117,949,701.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,988,724.30 : 445,431,713.52 = 78,642,203.44 : x
  2. Step 2: Convert to fraction form
    296,988,724.30/445,431,713.52 = 78,642,203.44/x
  3. Step 3: Cross multiply
    296,988,724.30x = 445,431,713.52 × 78,642,203.44
  4. Step 4: Simplify right side
    296,988,724.30x = 35,029,731,433,267,636
  5. Step 5: Solve for x
    x = 35,029,731,433,267,636/296,988,724.30
  6. Step 6: Final answer
    x = 117,949,701.68

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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.