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Finding the Fourth Proportional to 83,776.34, 125,705.51 and 39,407.56

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Solution

The fourth proportional to 83,776.34, 125,705.51 and 39,407.56 is: 59,130.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,776.34 : 125,705.51 = 39,407.56 : x
  2. Step 2: Convert to fraction form
    83,776.34/125,705.51 = 39,407.56/x
  3. Step 3: Cross multiply
    83,776.34x = 125,705.51 × 39,407.56
  4. Step 4: Simplify right side
    83,776.34x = 4,953,747,427.66
  5. Step 5: Solve for x
    x = 4,953,747,427.66/83,776.34
  6. Step 6: Final answer
    x = 59,130.63

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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.