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Finding the Fourth Proportional to 117,358.60, 176,016.30 and 72,905.80

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Solution

The fourth proportional to 117,358.60, 176,016.30 and 72,905.80 is: 109,345.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,358.60 : 176,016.30 = 72,905.80 : x
  2. Step 2: Convert to fraction form
    117,358.60/176,016.30 = 72,905.80/x
  3. Step 3: Cross multiply
    117,358.60x = 176,016.30 × 72,905.80
  4. Step 4: Simplify right side
    117,358.60x = 12,832,609,164.54
  5. Step 5: Solve for x
    x = 12,832,609,164.54/117,358.60
  6. Step 6: Final answer
    x = 109,345.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.