Home / 57,121.61-78,827.81-31,971.11

Finding the Fourth Proportional to 57,121.61, 78,827.81 and 31,971.11

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Solution

The fourth proportional to 57,121.61, 78,827.81 and 31,971.11 is: 44,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,121.61 : 78,827.81 = 31,971.11 : x
  2. Step 2: Convert to fraction form
    57,121.61/78,827.81 = 31,971.11/x
  3. Step 3: Cross multiply
    57,121.61x = 78,827.81 × 31,971.11
  4. Step 4: Simplify right side
    57,121.61x = 2,520,212,030.57
  5. Step 5: Solve for x
    x = 2,520,212,030.57/57,121.61
  6. Step 6: Final answer
    x = 44,120.12

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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.