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Finding the Fourth Proportional to 127,886.82, 191,830.64 and 39,139.98

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Solution

The fourth proportional to 127,886.82, 191,830.64 and 39,139.98 is: 58,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,886.82 : 191,830.64 = 39,139.98 : x
  2. Step 2: Convert to fraction form
    127,886.82/191,830.64 = 39,139.98/x
  3. Step 3: Cross multiply
    127,886.82x = 191,830.64 × 39,139.98
  4. Step 4: Simplify right side
    127,886.82x = 7,508,247,412.99
  5. Step 5: Solve for x
    x = 7,508,247,412.99/127,886.82
  6. Step 6: Final answer
    x = 58,710.10

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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.