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Finding the Fourth Proportional to 235,999.98, 325,678.35 and 128,570.10

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Solution

The fourth proportional to 235,999.98, 325,678.35 and 128,570.10 is: 177,425.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,999.98 : 325,678.35 = 128,570.10 : x
  2. Step 2: Convert to fraction form
    235,999.98/325,678.35 = 128,570.10/x
  3. Step 3: Cross multiply
    235,999.98x = 325,678.35 × 128,570.10
  4. Step 4: Simplify right side
    235,999.98x = 41,872,498,027.34
  5. Step 5: Solve for x
    x = 41,872,498,027.34/235,999.98
  6. Step 6: Final answer
    x = 177,425.85

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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.