Home / 117,631.78-162,351.21-85,905.70

Finding the Fourth Proportional to 117,631.78, 162,351.21 and 85,905.70

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Solution

The fourth proportional to 117,631.78, 162,351.21 and 85,905.70 is: 118,564.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,631.78 : 162,351.21 = 85,905.70 : x
  2. Step 2: Convert to fraction form
    117,631.78/162,351.21 = 85,905.70/x
  3. Step 3: Cross multiply
    117,631.78x = 162,351.21 × 85,905.70
  4. Step 4: Simplify right side
    117,631.78x = 13,946,894,340.90
  5. Step 5: Solve for x
    x = 13,946,894,340.90/117,631.78
  6. Step 6: Final answer
    x = 118,564.00

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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.