Home / 78,076.16-117,029.76-31,304.96

Finding the Fourth Proportional to 78,076.16, 117,029.76 and 31,304.96

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Solution

The fourth proportional to 78,076.16, 117,029.76 and 31,304.96 is: 46,923.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,076.16 : 117,029.76 = 31,304.96 : x
  2. Step 2: Convert to fraction form
    78,076.16/117,029.76 = 31,304.96/x
  3. Step 3: Cross multiply
    78,076.16x = 117,029.76 × 31,304.96
  4. Step 4: Simplify right side
    78,076.16x = 3,663,611,955.61
  5. Step 5: Solve for x
    x = 3,663,611,955.61/78,076.16
  6. Step 6: Final answer
    x = 46,923.57

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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.