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Finding the Fourth Proportional to 136,061.93, 187,771.72 and 75,638.76

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Solution

The fourth proportional to 136,061.93, 187,771.72 and 75,638.76 is: 104,384.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,061.93 : 187,771.72 = 75,638.76 : x
  2. Step 2: Convert to fraction form
    136,061.93/187,771.72 = 75,638.76/x
  3. Step 3: Cross multiply
    136,061.93x = 187,771.72 × 75,638.76
  4. Step 4: Simplify right side
    136,061.93x = 14,202,820,368.66
  5. Step 5: Solve for x
    x = 14,202,820,368.66/136,061.93
  6. Step 6: Final answer
    x = 104,384.97

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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.