Home / 128,272.80-177,079.59-80,552.46

Finding the Fourth Proportional to 128,272.80, 177,079.59 and 80,552.46

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Solution

The fourth proportional to 128,272.80, 177,079.59 and 80,552.46 is: 111,202.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,272.80 : 177,079.59 = 80,552.46 : x
  2. Step 2: Convert to fraction form
    128,272.80/177,079.59 = 80,552.46/x
  3. Step 3: Cross multiply
    128,272.80x = 177,079.59 × 80,552.46
  4. Step 4: Simplify right side
    128,272.80x = 14,264,196,484.82
  5. Step 5: Solve for x
    x = 14,264,196,484.82/128,272.80
  6. Step 6: Final answer
    x = 111,202.04

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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.