Home / 128,286.15-177,029.66-70,921.82

Finding the Fourth Proportional to 128,286.15, 177,029.66 and 70,921.82

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Solution

The fourth proportional to 128,286.15, 177,029.66 and 70,921.82 is: 97,869.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,286.15 : 177,029.66 = 70,921.82 : x
  2. Step 2: Convert to fraction form
    128,286.15/177,029.66 = 70,921.82/x
  3. Step 3: Cross multiply
    128,286.15x = 177,029.66 × 70,921.82
  4. Step 4: Simplify right side
    128,286.15x = 12,555,265,681.18
  5. Step 5: Solve for x
    x = 12,555,265,681.18/128,286.15
  6. Step 6: Final answer
    x = 97,869.22

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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.