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Finding the Fourth Proportional to 139,848.69, 209,855.67 and 64,994.97

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Solution

The fourth proportional to 139,848.69, 209,855.67 and 64,994.97 is: 97,530.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,848.69 : 209,855.67 = 64,994.97 : x
  2. Step 2: Convert to fraction form
    139,848.69/209,855.67 = 64,994.97/x
  3. Step 3: Cross multiply
    139,848.69x = 209,855.67 × 64,994.97
  4. Step 4: Simplify right side
    139,848.69x = 13,639,562,975.98
  5. Step 5: Solve for x
    x = 13,639,562,975.98/139,848.69
  6. Step 6: Final answer
    x = 97,530.86

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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.