Home / 80,678.36-111,220.72-53,811.06

Finding the Fourth Proportional to 80,678.36, 111,220.72 and 53,811.06

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Solution

The fourth proportional to 80,678.36, 111,220.72 and 53,811.06 is: 74,182.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,678.36 : 111,220.72 = 53,811.06 : x
  2. Step 2: Convert to fraction form
    80,678.36/111,220.72 = 53,811.06/x
  3. Step 3: Cross multiply
    80,678.36x = 111,220.72 × 53,811.06
  4. Step 4: Simplify right side
    80,678.36x = 5,984,904,837.16
  5. Step 5: Solve for x
    x = 5,984,904,837.16/80,678.36
  6. Step 6: Final answer
    x = 74,182.28

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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.