Home / 128,921.06-177,914.14-72,336.62

Finding the Fourth Proportional to 128,921.06, 177,914.14 and 72,336.62

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Solution

The fourth proportional to 128,921.06, 177,914.14 and 72,336.62 is: 99,826.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,921.06 : 177,914.14 = 72,336.62 : x
  2. Step 2: Convert to fraction form
    128,921.06/177,914.14 = 72,336.62/x
  3. Step 3: Cross multiply
    128,921.06x = 177,914.14 × 72,336.62
  4. Step 4: Simplify right side
    128,921.06x = 12,869,707,537.81
  5. Step 5: Solve for x
    x = 12,869,707,537.81/128,921.06
  6. Step 6: Final answer
    x = 99,826.26

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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.