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Finding the Fourth Proportional to 101,813.71, 140,519.78 and 56,506.25

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Solution

The fourth proportional to 101,813.71, 140,519.78 and 56,506.25 is: 77,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,813.71 : 140,519.78 = 56,506.25 : x
  2. Step 2: Convert to fraction form
    101,813.71/140,519.78 = 56,506.25/x
  3. Step 3: Cross multiply
    101,813.71x = 140,519.78 × 56,506.25
  4. Step 4: Simplify right side
    101,813.71x = 7,940,245,818.63
  5. Step 5: Solve for x
    x = 7,940,245,818.63/101,813.71
  6. Step 6: Final answer
    x = 77,987.98

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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.