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Finding the Fourth Proportional to 170,781.34, 235,728.30 and 99,193.54

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Solution

The fourth proportional to 170,781.34, 235,728.30 and 99,193.54 is: 136,916.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,781.34 : 235,728.30 = 99,193.54 : x
  2. Step 2: Convert to fraction form
    170,781.34/235,728.30 = 99,193.54/x
  3. Step 3: Cross multiply
    170,781.34x = 235,728.30 × 99,193.54
  4. Step 4: Simplify right side
    170,781.34x = 23,382,724,555.18
  5. Step 5: Solve for x
    x = 23,382,724,555.18/170,781.34
  6. Step 6: Final answer
    x = 136,916.16

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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.