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Finding the Fourth Proportional to 117,421, 162,056.25 and 65,757.77

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Solution

The fourth proportional to 117,421, 162,056.25 and 65,757.77 is: 90,754.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,421 : 162,056.25 = 65,757.77 : x
  2. Step 2: Convert to fraction form
    117,421/162,056.25 = 65,757.77/x
  3. Step 3: Cross multiply
    117,421x = 162,056.25 × 65,757.77
  4. Step 4: Simplify right side
    117,421x = 10,656,457,614.56
  5. Step 5: Solve for x
    x = 10,656,457,614.56/117,421
  6. Step 6: Final answer
    x = 90,754.27

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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.