Home / 128,871.06-177,833.52-71,506.75

Finding the Fourth Proportional to 128,871.06, 177,833.52 and 71,506.75

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Solution

The fourth proportional to 128,871.06, 177,833.52 and 71,506.75 is: 98,674.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,871.06 : 177,833.52 = 71,506.75 : x
  2. Step 2: Convert to fraction form
    128,871.06/177,833.52 = 71,506.75/x
  3. Step 3: Cross multiply
    128,871.06x = 177,833.52 × 71,506.75
  4. Step 4: Simplify right side
    128,871.06x = 12,716,297,056.26
  5. Step 5: Solve for x
    x = 12,716,297,056.26/128,871.06
  6. Step 6: Final answer
    x = 98,674.57

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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.