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Finding the Fourth Proportional to 197,693.90, 272,806.80 and 117,128.87

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Solution

The fourth proportional to 197,693.90, 272,806.80 and 117,128.87 is: 161,631.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,693.90 : 272,806.80 = 117,128.87 : x
  2. Step 2: Convert to fraction form
    197,693.90/272,806.80 = 117,128.87/x
  3. Step 3: Cross multiply
    197,693.90x = 272,806.80 × 117,128.87
  4. Step 4: Simplify right side
    197,693.90x = 31,953,552,455.10
  5. Step 5: Solve for x
    x = 31,953,552,455.10/197,693.90
  6. Step 6: Final answer
    x = 161,631.45

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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.