Home / 84,899.36-126,725.80-78,644

Finding the Fourth Proportional to 84,899.36, 126,725.80 and 78,644

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Solution

The fourth proportional to 84,899.36, 126,725.80 and 78,644 is: 117,388.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,899.36 : 126,725.80 = 78,644 : x
  2. Step 2: Convert to fraction form
    84,899.36/126,725.80 = 78,644/x
  3. Step 3: Cross multiply
    84,899.36x = 126,725.80 × 78,644
  4. Step 4: Simplify right side
    84,899.36x = 9,966,223,815.20
  5. Step 5: Solve for x
    x = 9,966,223,815.20/84,899.36
  6. Step 6: Final answer
    x = 117,388.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.