Home / 86,619.48-129,824.58-42,179.64

Finding the Fourth Proportional to 86,619.48, 129,824.58 and 42,179.64

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Solution

The fourth proportional to 86,619.48, 129,824.58 and 42,179.64 is: 63,218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,619.48 : 129,824.58 = 42,179.64 : x
  2. Step 2: Convert to fraction form
    86,619.48/129,824.58 = 42,179.64/x
  3. Step 3: Cross multiply
    86,619.48x = 129,824.58 × 42,179.64
  4. Step 4: Simplify right side
    86,619.48x = 5,475,954,047.55
  5. Step 5: Solve for x
    x = 5,475,954,047.55/86,619.48
  6. Step 6: Final answer
    x = 63,218.51

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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.