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Finding the Fourth Proportional to 83,852.56, 115,706 and 56,687.72

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Solution

The fourth proportional to 83,852.56, 115,706 and 56,687.72 is: 78,221.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,852.56 : 115,706 = 56,687.72 : x
  2. Step 2: Convert to fraction form
    83,852.56/115,706 = 56,687.72/x
  3. Step 3: Cross multiply
    83,852.56x = 115,706 × 56,687.72
  4. Step 4: Simplify right side
    83,852.56x = 6,559,109,330.32
  5. Step 5: Solve for x
    x = 6,559,109,330.32/83,852.56
  6. Step 6: Final answer
    x = 78,221.93

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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.