Home / 81,460.10-122,031.08-38,704.68

Finding the Fourth Proportional to 81,460.10, 122,031.08 and 38,704.68

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Solution

The fourth proportional to 81,460.10, 122,031.08 and 38,704.68 is: 57,981.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,460.10 : 122,031.08 = 38,704.68 : x
  2. Step 2: Convert to fraction form
    81,460.10/122,031.08 = 38,704.68/x
  3. Step 3: Cross multiply
    81,460.10x = 122,031.08 × 38,704.68
  4. Step 4: Simplify right side
    81,460.10x = 4,723,174,405.03
  5. Step 5: Solve for x
    x = 4,723,174,405.03/81,460.10
  6. Step 6: Final answer
    x = 57,981.44

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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.