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Finding the Fourth Proportional to 128,523.56, 177,362.48 and 71,934.94

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Solution

The fourth proportional to 128,523.56, 177,362.48 and 71,934.94 is: 99,270.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,523.56 : 177,362.48 = 71,934.94 : x
  2. Step 2: Convert to fraction form
    128,523.56/177,362.48 = 71,934.94/x
  3. Step 3: Cross multiply
    128,523.56x = 177,362.48 × 71,934.94
  4. Step 4: Simplify right side
    128,523.56x = 12,758,558,110.56
  5. Step 5: Solve for x
    x = 12,758,558,110.56/128,523.56
  6. Step 6: Final answer
    x = 99,270.19

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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.