Home / 128,848.25-177,830.03-78,576.41

Finding the Fourth Proportional to 128,848.25, 177,830.03 and 78,576.41

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Solution

The fourth proportional to 128,848.25, 177,830.03 and 78,576.41 is: 108,447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848.25 : 177,830.03 = 78,576.41 : x
  2. Step 2: Convert to fraction form
    128,848.25/177,830.03 = 78,576.41/x
  3. Step 3: Cross multiply
    128,848.25x = 177,830.03 × 78,576.41
  4. Step 4: Simplify right side
    128,848.25x = 13,973,244,954.71
  5. Step 5: Solve for x
    x = 13,973,244,954.71/128,848.25
  6. Step 6: Final answer
    x = 108,447.30

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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.