Home / 128,571.81-177,423.15-71,207.25

Finding the Fourth Proportional to 128,571.81, 177,423.15 and 71,207.25

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Solution

The fourth proportional to 128,571.81, 177,423.15 and 71,207.25 is: 98,262.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,571.81 : 177,423.15 = 71,207.25 : x
  2. Step 2: Convert to fraction form
    128,571.81/177,423.15 = 71,207.25/x
  3. Step 3: Cross multiply
    128,571.81x = 177,423.15 × 71,207.25
  4. Step 4: Simplify right side
    128,571.81x = 12,633,814,597.84
  5. Step 5: Solve for x
    x = 12,633,814,597.84/128,571.81
  6. Step 6: Final answer
    x = 98,262.71

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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.