Home / 81,524.72-122,266.56-31,587.68

Finding the Fourth Proportional to 81,524.72, 122,266.56 and 31,587.68

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Solution

The fourth proportional to 81,524.72, 122,266.56 and 31,587.68 is: 47,373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,524.72 : 122,266.56 = 31,587.68 : x
  2. Step 2: Convert to fraction form
    81,524.72/122,266.56 = 31,587.68/x
  3. Step 3: Cross multiply
    81,524.72x = 122,266.56 × 31,587.68
  4. Step 4: Simplify right side
    81,524.72x = 3,862,116,971.98
  5. Step 5: Solve for x
    x = 3,862,116,971.98/81,524.72
  6. Step 6: Final answer
    x = 47,373.57

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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.