Home / 130,636.61-195,622.54-86,128.33

Finding the Fourth Proportional to 130,636.61, 195,622.54 and 86,128.33

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Solution

The fourth proportional to 130,636.61, 195,622.54 and 86,128.33 is: 128,973.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,636.61 : 195,622.54 = 86,128.33 : x
  2. Step 2: Convert to fraction form
    130,636.61/195,622.54 = 86,128.33/x
  3. Step 3: Cross multiply
    130,636.61x = 195,622.54 × 86,128.33
  4. Step 4: Simplify right side
    130,636.61x = 16,848,642,680.56
  5. Step 5: Solve for x
    x = 16,848,642,680.56/130,636.61
  6. Step 6: Final answer
    x = 128,973.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.