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Finding the Fourth Proportional to 207,355.98, 310,848.74 and 80,966.82

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Solution

The fourth proportional to 207,355.98, 310,848.74 and 80,966.82 is: 121,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,355.98 : 310,848.74 = 80,966.82 : x
  2. Step 2: Convert to fraction form
    207,355.98/310,848.74 = 80,966.82/x
  3. Step 3: Cross multiply
    207,355.98x = 310,848.74 × 80,966.82
  4. Step 4: Simplify right side
    207,355.98x = 25,168,432,019.73
  5. Step 5: Solve for x
    x = 25,168,432,019.73/207,355.98
  6. Step 6: Final answer
    x = 121,377.90

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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.