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Finding the Fourth Proportional to 128,200.56, 176,918.64 and 70,841.21

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Solution

The fourth proportional to 128,200.56, 176,918.64 and 70,841.21 is: 97,761.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,200.56 : 176,918.64 = 70,841.21 : x
  2. Step 2: Convert to fraction form
    128,200.56/176,918.64 = 70,841.21/x
  3. Step 3: Cross multiply
    128,200.56x = 176,918.64 × 70,841.21
  4. Step 4: Simplify right side
    128,200.56x = 12,533,129,644.56
  5. Step 5: Solve for x
    x = 12,533,129,644.56/128,200.56
  6. Step 6: Final answer
    x = 97,761.89

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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.