Home / 81,140.36-111,973.69-45,330.38

Finding the Fourth Proportional to 81,140.36, 111,973.69 and 45,330.38

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Solution

The fourth proportional to 81,140.36, 111,973.69 and 45,330.38 is: 62,555.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.36 : 111,973.69 = 45,330.38 : x
  2. Step 2: Convert to fraction form
    81,140.36/111,973.69 = 45,330.38/x
  3. Step 3: Cross multiply
    81,140.36x = 111,973.69 × 45,330.38
  4. Step 4: Simplify right side
    81,140.36x = 5,075,809,917.70
  5. Step 5: Solve for x
    x = 5,075,809,917.70/81,140.36
  6. Step 6: Final answer
    x = 62,555.92

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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.