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Finding the Fourth Proportional to 105,529.70, 158,160.15 and 43,129.70

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Solution

The fourth proportional to 105,529.70, 158,160.15 and 43,129.70 is: 64,639.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,529.70 : 158,160.15 = 43,129.70 : x
  2. Step 2: Convert to fraction form
    105,529.70/158,160.15 = 43,129.70/x
  3. Step 3: Cross multiply
    105,529.70x = 158,160.15 × 43,129.70
  4. Step 4: Simplify right side
    105,529.70x = 6,821,399,821.46
  5. Step 5: Solve for x
    x = 6,821,399,821.46/105,529.70
  6. Step 6: Final answer
    x = 64,639.62

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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.