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Finding the Fourth Proportional to 117,139.70, 161,652.11 and 63,423.61

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Solution

The fourth proportional to 117,139.70, 161,652.11 and 63,423.61 is: 87,524.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,139.70 : 161,652.11 = 63,423.61 : x
  2. Step 2: Convert to fraction form
    117,139.70/161,652.11 = 63,423.61/x
  3. Step 3: Cross multiply
    117,139.70x = 161,652.11 × 63,423.61
  4. Step 4: Simplify right side
    117,139.70x = 10,252,559,659.07
  5. Step 5: Solve for x
    x = 10,252,559,659.07/117,139.70
  6. Step 6: Final answer
    x = 87,524.21

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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.