Home / 78,541.88-117,815.45-31,165.79

Finding the Fourth Proportional to 78,541.88, 117,815.45 and 31,165.79

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Solution

The fourth proportional to 78,541.88, 117,815.45 and 31,165.79 is: 46,749.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,541.88 : 117,815.45 = 31,165.79 : x
  2. Step 2: Convert to fraction form
    78,541.88/117,815.45 = 31,165.79/x
  3. Step 3: Cross multiply
    78,541.88x = 117,815.45 × 31,165.79
  4. Step 4: Simplify right side
    78,541.88x = 3,671,810,828.55
  5. Step 5: Solve for x
    x = 3,671,810,828.55/78,541.88
  6. Step 6: Final answer
    x = 46,749.72

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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.