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Finding the Fourth Proportional to 140,357.79, 193,698.53 and 76,699.68

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Solution

The fourth proportional to 140,357.79, 193,698.53 and 76,699.68 is: 105,848.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,357.79 : 193,698.53 = 76,699.68 : x
  2. Step 2: Convert to fraction form
    140,357.79/193,698.53 = 76,699.68/x
  3. Step 3: Cross multiply
    140,357.79x = 193,698.53 × 76,699.68
  4. Step 4: Simplify right side
    140,357.79x = 14,856,614,883.97
  5. Step 5: Solve for x
    x = 14,856,614,883.97/140,357.79
  6. Step 6: Final answer
    x = 105,848.17

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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.