Home / 81,040.10-111,701.48-54,172.81

Finding the Fourth Proportional to 81,040.10, 111,701.48 and 54,172.81

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Solution

The fourth proportional to 81,040.10, 111,701.48 and 54,172.81 is: 74,668.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,040.10 : 111,701.48 = 54,172.81 : x
  2. Step 2: Convert to fraction form
    81,040.10/111,701.48 = 54,172.81/x
  3. Step 3: Cross multiply
    81,040.10x = 111,701.48 × 54,172.81
  4. Step 4: Simplify right side
    81,040.10x = 6,051,182,908.94
  5. Step 5: Solve for x
    x = 6,051,182,908.94/81,040.10
  6. Step 6: Final answer
    x = 74,668.99

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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.