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Finding the Fourth Proportional to 171,400.69, 257,153.69 and 76,710.68

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Solution

The fourth proportional to 171,400.69, 257,153.69 and 76,710.68 is: 115,089.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,400.69 : 257,153.69 = 76,710.68 : x
  2. Step 2: Convert to fraction form
    171,400.69/257,153.69 = 76,710.68/x
  3. Step 3: Cross multiply
    171,400.69x = 257,153.69 × 76,710.68
  4. Step 4: Simplify right side
    171,400.69x = 19,726,434,424.41
  5. Step 5: Solve for x
    x = 19,726,434,424.41/171,400.69
  6. Step 6: Final answer
    x = 115,089.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.