Home / 131,511.42-197,316.81-78,957.54

Finding the Fourth Proportional to 131,511.42, 197,316.81 and 78,957.54

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Solution

The fourth proportional to 131,511.42, 197,316.81 and 78,957.54 is: 118,466.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,511.42 : 197,316.81 = 78,957.54 : x
  2. Step 2: Convert to fraction form
    131,511.42/197,316.81 = 78,957.54/x
  3. Step 3: Cross multiply
    131,511.42x = 197,316.81 × 78,957.54
  4. Step 4: Simplify right side
    131,511.42x = 15,579,649,918.25
  5. Step 5: Solve for x
    x = 15,579,649,918.25/131,511.42
  6. Step 6: Final answer
    x = 118,466.14

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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.