Home / 103,819.12-155,629.20-66,273.28

Finding the Fourth Proportional to 103,819.12, 155,629.20 and 66,273.28

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Solution

The fourth proportional to 103,819.12, 155,629.20 and 66,273.28 is: 99,346.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,819.12 : 155,629.20 = 66,273.28 : x
  2. Step 2: Convert to fraction form
    103,819.12/155,629.20 = 66,273.28/x
  3. Step 3: Cross multiply
    103,819.12x = 155,629.20 × 66,273.28
  4. Step 4: Simplify right side
    103,819.12x = 10,314,057,547.78
  5. Step 5: Solve for x
    x = 10,314,057,547.78/103,819.12
  6. Step 6: Final answer
    x = 99,346.42

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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.