Home / 128,365.88-177,326.10-116,861.57

Finding the Fourth Proportional to 128,365.88, 177,326.10 and 116,861.57

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Solution

The fourth proportional to 128,365.88, 177,326.10 and 116,861.57 is: 161,433.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,365.88 : 177,326.10 = 116,861.57 : x
  2. Step 2: Convert to fraction form
    128,365.88/177,326.10 = 116,861.57/x
  3. Step 3: Cross multiply
    128,365.88x = 177,326.10 × 116,861.57
  4. Step 4: Simplify right side
    128,365.88x = 20,722,605,561.35
  5. Step 5: Solve for x
    x = 20,722,605,561.35/128,365.88
  6. Step 6: Final answer
    x = 161,433.91

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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.