Home / 128,929.75-177,924.27-72,342.34

Finding the Fourth Proportional to 128,929.75, 177,924.27 and 72,342.34

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Solution

The fourth proportional to 128,929.75, 177,924.27 and 72,342.34 is: 99,833.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,929.75 : 177,924.27 = 72,342.34 : x
  2. Step 2: Convert to fraction form
    128,929.75/177,924.27 = 72,342.34/x
  3. Step 3: Cross multiply
    128,929.75x = 177,924.27 × 72,342.34
  4. Step 4: Simplify right side
    128,929.75x = 12,871,458,034.59
  5. Step 5: Solve for x
    x = 12,871,458,034.59/128,929.75
  6. Step 6: Final answer
    x = 99,833.11

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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.