Home / 81,000.16-111,782.42-50,782.64

Finding the Fourth Proportional to 81,000.16, 111,782.42 and 50,782.64

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Solution

The fourth proportional to 81,000.16, 111,782.42 and 50,782.64 is: 70,081.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.16 : 111,782.42 = 50,782.64 : x
  2. Step 2: Convert to fraction form
    81,000.16/111,782.42 = 50,782.64/x
  3. Step 3: Cross multiply
    81,000.16x = 111,782.42 × 50,782.64
  4. Step 4: Simplify right side
    81,000.16x = 5,676,606,393.19
  5. Step 5: Solve for x
    x = 5,676,606,393.19/81,000.16
  6. Step 6: Final answer
    x = 70,081.42

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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.