Home / 86,999.10-130,693.05-83,694.30

Finding the Fourth Proportional to 86,999.10, 130,693.05 and 83,694.30

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Solution

The fourth proportional to 86,999.10, 130,693.05 and 83,694.30 is: 125,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.10 : 130,693.05 = 83,694.30 : x
  2. Step 2: Convert to fraction form
    86,999.10/130,693.05 = 83,694.30/x
  3. Step 3: Cross multiply
    86,999.10x = 130,693.05 × 83,694.30
  4. Step 4: Simplify right side
    86,999.10x = 10,938,263,334.62
  5. Step 5: Solve for x
    x = 10,938,263,334.62/86,999.10
  6. Step 6: Final answer
    x = 125,728.47

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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.