Home / 128,521.60-177,424.15-80,801.26

Finding the Fourth Proportional to 128,521.60, 177,424.15 and 80,801.26

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Solution

The fourth proportional to 128,521.60, 177,424.15 and 80,801.26 is: 111,546.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,521.60 : 177,424.15 = 80,801.26 : x
  2. Step 2: Convert to fraction form
    128,521.60/177,424.15 = 80,801.26/x
  3. Step 3: Cross multiply
    128,521.60x = 177,424.15 × 80,801.26
  4. Step 4: Simplify right side
    128,521.60x = 14,336,094,874.43
  5. Step 5: Solve for x
    x = 14,336,094,874.43/128,521.60
  6. Step 6: Final answer
    x = 111,546.19

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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.