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Finding the Fourth Proportional to 127,811.40, 191,710.10 and 39,064.86

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Solution

The fourth proportional to 127,811.40, 191,710.10 and 39,064.86 is: 58,595.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,811.40 : 191,710.10 = 39,064.86 : x
  2. Step 2: Convert to fraction form
    127,811.40/191,710.10 = 39,064.86/x
  3. Step 3: Cross multiply
    127,811.40x = 191,710.10 × 39,064.86
  4. Step 4: Simplify right side
    127,811.40x = 7,489,128,021.76
  5. Step 5: Solve for x
    x = 7,489,128,021.76/127,811.40
  6. Step 6: Final answer
    x = 58,595.15

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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.