Home / 128,868.16-177,801.60-83,548

Finding the Fourth Proportional to 128,868.16, 177,801.60 and 83,548

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Solution

The fourth proportional to 128,868.16, 177,801.60 and 83,548 is: 115,272.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,868.16 : 177,801.60 = 83,548 : x
  2. Step 2: Convert to fraction form
    128,868.16/177,801.60 = 83,548/x
  3. Step 3: Cross multiply
    128,868.16x = 177,801.60 × 83,548
  4. Step 4: Simplify right side
    128,868.16x = 14,854,968,076.80
  5. Step 5: Solve for x
    x = 14,854,968,076.80/128,868.16
  6. Step 6: Final answer
    x = 115,272.60

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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.