Home / 86,181.74-129,005.30-46,640.78

Finding the Fourth Proportional to 86,181.74, 129,005.30 and 46,640.78

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Solution

The fourth proportional to 86,181.74, 129,005.30 and 46,640.78 is: 69,816.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,181.74 : 129,005.30 = 46,640.78 : x
  2. Step 2: Convert to fraction form
    86,181.74/129,005.30 = 46,640.78/x
  3. Step 3: Cross multiply
    86,181.74x = 129,005.30 × 46,640.78
  4. Step 4: Simplify right side
    86,181.74x = 6,016,906,937.90
  5. Step 5: Solve for x
    x = 6,016,906,937.90/86,181.74
  6. Step 6: Final answer
    x = 69,816.50

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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.