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Finding the Fourth Proportional to 113,705.28, 156,725.28 and 75,965.76

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Solution

The fourth proportional to 113,705.28, 156,725.28 and 75,965.76 is: 104,707.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,705.28 : 156,725.28 = 75,965.76 : x
  2. Step 2: Convert to fraction form
    113,705.28/156,725.28 = 75,965.76/x
  3. Step 3: Cross multiply
    113,705.28x = 156,725.28 × 75,965.76
  4. Step 4: Simplify right side
    113,705.28x = 11,905,755,006.41
  5. Step 5: Solve for x
    x = 11,905,755,006.41/113,705.28
  6. Step 6: Final answer
    x = 104,707.14

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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.