Home / 81,045.48-121,583.98-31,121.91

Finding the Fourth Proportional to 81,045.48, 121,583.98 and 31,121.91

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Solution

The fourth proportional to 81,045.48, 121,583.98 and 31,121.91 is: 46,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,045.48 : 121,583.98 = 31,121.91 : x
  2. Step 2: Convert to fraction form
    81,045.48/121,583.98 = 31,121.91/x
  3. Step 3: Cross multiply
    81,045.48x = 121,583.98 × 31,121.91
  4. Step 4: Simplify right side
    81,045.48x = 3,783,925,301.24
  5. Step 5: Solve for x
    x = 3,783,925,301.24/81,045.48
  6. Step 6: Final answer
    x = 46,688.91

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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.