Home / 81,039.47-111,700.62-54,172.18

Finding the Fourth Proportional to 81,039.47, 111,700.62 and 54,172.18

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Solution

The fourth proportional to 81,039.47, 111,700.62 and 54,172.18 is: 74,668.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,039.47 : 111,700.62 = 54,172.18 : x
  2. Step 2: Convert to fraction form
    81,039.47/111,700.62 = 54,172.18/x
  3. Step 3: Cross multiply
    81,039.47x = 111,700.62 × 54,172.18
  4. Step 4: Simplify right side
    81,039.47x = 6,051,066,092.75
  5. Step 5: Solve for x
    x = 6,051,066,092.75/81,039.47
  6. Step 6: Final answer
    x = 74,668.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.