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Finding the Fourth Proportional to 128,792.37, 177,714.21 and 73,597.53

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Solution

The fourth proportional to 128,792.37, 177,714.21 and 73,597.53 is: 101,553.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,792.37 : 177,714.21 = 73,597.53 : x
  2. Step 2: Convert to fraction form
    128,792.37/177,714.21 = 73,597.53/x
  3. Step 3: Cross multiply
    128,792.37x = 177,714.21 × 73,597.53
  4. Step 4: Simplify right side
    128,792.37x = 13,079,326,901.90
  5. Step 5: Solve for x
    x = 13,079,326,901.90/128,792.37
  6. Step 6: Final answer
    x = 101,553.59

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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.