Home / 81,555.08-122,291.10-31,649.49

Finding the Fourth Proportional to 81,555.08, 122,291.10 and 31,649.49

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Solution

The fourth proportional to 81,555.08, 122,291.10 and 31,649.49 is: 47,458.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,555.08 : 122,291.10 = 31,649.49 : x
  2. Step 2: Convert to fraction form
    81,555.08/122,291.10 = 31,649.49/x
  3. Step 3: Cross multiply
    81,555.08x = 122,291.10 × 31,649.49
  4. Step 4: Simplify right side
    81,555.08x = 3,870,450,946.54
  5. Step 5: Solve for x
    x = 3,870,450,946.54/81,555.08
  6. Step 6: Final answer
    x = 47,458.13

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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.