Home / 128,921.37-177,908.70-71,557.32

Finding the Fourth Proportional to 128,921.37, 177,908.70 and 71,557.32

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Solution

The fourth proportional to 128,921.37, 177,908.70 and 71,557.32 is: 98,747.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,921.37 : 177,908.70 = 71,557.32 : x
  2. Step 2: Convert to fraction form
    128,921.37/177,908.70 = 71,557.32/x
  3. Step 3: Cross multiply
    128,921.37x = 177,908.70 × 71,557.32
  4. Step 4: Simplify right side
    128,921.37x = 12,730,669,776.68
  5. Step 5: Solve for x
    x = 12,730,669,776.68/128,921.37
  6. Step 6: Final answer
    x = 98,747.55

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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.