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Finding the Fourth Proportional to 105,299.60, 158,011.80 and 38,786.48

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Solution

The fourth proportional to 105,299.60, 158,011.80 and 38,786.48 is: 58,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,299.60 : 158,011.80 = 38,786.48 : x
  2. Step 2: Convert to fraction form
    105,299.60/158,011.80 = 38,786.48/x
  3. Step 3: Cross multiply
    105,299.60x = 158,011.80 × 38,786.48
  4. Step 4: Simplify right side
    105,299.60x = 6,128,721,520.46
  5. Step 5: Solve for x
    x = 6,128,721,520.46/105,299.60
  6. Step 6: Final answer
    x = 58,202.70

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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.