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Finding the Fourth Proportional to 113,628, 156,642.68 and 79,530.96

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Solution

The fourth proportional to 113,628, 156,642.68 and 79,530.96 is: 109,637.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,628 : 156,642.68 = 79,530.96 : x
  2. Step 2: Convert to fraction form
    113,628/156,642.68 = 79,530.96/x
  3. Step 3: Cross multiply
    113,628x = 156,642.68 × 79,530.96
  4. Step 4: Simplify right side
    113,628x = 12,457,942,717.37
  5. Step 5: Solve for x
    x = 12,457,942,717.37/113,628
  6. Step 6: Final answer
    x = 109,637.97

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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.