Home / 86,698.09-129,940.80-49,289.50

Finding the Fourth Proportional to 86,698.09, 129,940.80 and 49,289.50

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Solution

The fourth proportional to 86,698.09, 129,940.80 and 49,289.50 is: 73,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,698.09 : 129,940.80 = 49,289.50 : x
  2. Step 2: Convert to fraction form
    86,698.09/129,940.80 = 49,289.50/x
  3. Step 3: Cross multiply
    86,698.09x = 129,940.80 × 49,289.50
  4. Step 4: Simplify right side
    86,698.09x = 6,404,717,061.60
  5. Step 5: Solve for x
    x = 6,404,717,061.60/86,698.09
  6. Step 6: Final answer
    x = 73,873.80

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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.