Home / 81,141.12-111,972.69-45,331.38

Finding the Fourth Proportional to 81,141.12, 111,972.69 and 45,331.38

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Solution

The fourth proportional to 81,141.12, 111,972.69 and 45,331.38 is: 62,556.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,141.12 : 111,972.69 = 45,331.38 : x
  2. Step 2: Convert to fraction form
    81,141.12/111,972.69 = 45,331.38/x
  3. Step 3: Cross multiply
    81,141.12x = 111,972.69 × 45,331.38
  4. Step 4: Simplify right side
    81,141.12x = 5,075,877,096.14
  5. Step 5: Solve for x
    x = 5,075,877,096.14/81,141.12
  6. Step 6: Final answer
    x = 62,556.16

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1.5x scale

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.