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Finding the Fourth Proportional to 117,458.40, 162,037.20 and 67,128

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Solution

The fourth proportional to 117,458.40, 162,037.20 and 67,128 is: 92,604.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,458.40 : 162,037.20 = 67,128 : x
  2. Step 2: Convert to fraction form
    117,458.40/162,037.20 = 67,128/x
  3. Step 3: Cross multiply
    117,458.40x = 162,037.20 × 67,128
  4. Step 4: Simplify right side
    117,458.40x = 10,877,233,161.60
  5. Step 5: Solve for x
    x = 10,877,233,161.60/117,458.40
  6. Step 6: Final answer
    x = 92,604.98

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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.