Home / 91,431.47-137,111.74-31,448.54

Finding the Fourth Proportional to 91,431.47, 137,111.74 and 31,448.54

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Solution

The fourth proportional to 91,431.47, 137,111.74 and 31,448.54 is: 47,160.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,431.47 : 137,111.74 = 31,448.54 : x
  2. Step 2: Convert to fraction form
    91,431.47/137,111.74 = 31,448.54/x
  3. Step 3: Cross multiply
    91,431.47x = 137,111.74 × 31,448.54
  4. Step 4: Simplify right side
    91,431.47x = 4,311,963,354.30
  5. Step 5: Solve for x
    x = 4,311,963,354.30/91,431.47
  6. Step 6: Final answer
    x = 47,160.61

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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.