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Finding the Fourth Proportional to 128,953, 193,430.74 and 38,996.42

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Solution

The fourth proportional to 128,953, 193,430.74 and 38,996.42 is: 58,495.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,953 : 193,430.74 = 38,996.42 : x
  2. Step 2: Convert to fraction form
    128,953/193,430.74 = 38,996.42/x
  3. Step 3: Cross multiply
    128,953x = 193,430.74 × 38,996.42
  4. Step 4: Simplify right side
    128,953x = 7,543,106,377.95
  5. Step 5: Solve for x
    x = 7,543,106,377.95/128,953
  6. Step 6: Final answer
    x = 58,495.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.