Home / 128,927.81-177,917.56-71,563.76

Finding the Fourth Proportional to 128,927.81, 177,917.56 and 71,563.76

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Solution

The fourth proportional to 128,927.81, 177,917.56 and 71,563.76 is: 98,756.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.81 : 177,917.56 = 71,563.76 : x
  2. Step 2: Convert to fraction form
    128,927.81/177,917.56 = 71,563.76/x
  3. Step 3: Cross multiply
    128,927.81x = 177,917.56 × 71,563.76
  4. Step 4: Simplify right side
    128,927.81x = 12,732,449,563.63
  5. Step 5: Solve for x
    x = 12,732,449,563.63/128,927.81
  6. Step 6: Final answer
    x = 98,756.42

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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.