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Finding the Fourth Proportional to 117,663.10, 162,378.64 and 72,367.68

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Solution

The fourth proportional to 117,663.10, 162,378.64 and 72,367.68 is: 99,869.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,663.10 : 162,378.64 = 72,367.68 : x
  2. Step 2: Convert to fraction form
    117,663.10/162,378.64 = 72,367.68/x
  3. Step 3: Cross multiply
    117,663.10x = 162,378.64 × 72,367.68
  4. Step 4: Simplify right side
    117,663.10x = 11,750,965,458.36
  5. Step 5: Solve for x
    x = 11,750,965,458.36/117,663.10
  6. Step 6: Final answer
    x = 99,869.59

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1.5x scale

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.