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Finding the Fourth Proportional to 127,963.80, 191,700.90 and 68,779.80

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Solution

The fourth proportional to 127,963.80, 191,700.90 and 68,779.80 is: 103,038.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,963.80 : 191,700.90 = 68,779.80 : x
  2. Step 2: Convert to fraction form
    127,963.80/191,700.90 = 68,779.80/x
  3. Step 3: Cross multiply
    127,963.80x = 191,700.90 × 68,779.80
  4. Step 4: Simplify right side
    127,963.80x = 13,185,149,561.82
  5. Step 5: Solve for x
    x = 13,185,149,561.82/127,963.80
  6. Step 6: Final answer
    x = 103,038.12

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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.