Home / 100,276.56-138,381.60-59,991.96

Finding the Fourth Proportional to 100,276.56, 138,381.60 and 59,991.96

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Solution

The fourth proportional to 100,276.56, 138,381.60 and 59,991.96 is: 82,788.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,276.56 : 138,381.60 = 59,991.96 : x
  2. Step 2: Convert to fraction form
    100,276.56/138,381.60 = 59,991.96/x
  3. Step 3: Cross multiply
    100,276.56x = 138,381.60 × 59,991.96
  4. Step 4: Simplify right side
    100,276.56x = 8,301,783,411.94
  5. Step 5: Solve for x
    x = 8,301,783,411.94/100,276.56
  6. Step 6: Final answer
    x = 82,788.87

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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.