Home / 78,140.44-117,216.08-31,393.28

Finding the Fourth Proportional to 78,140.44, 117,216.08 and 31,393.28

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Solution

The fourth proportional to 78,140.44, 117,216.08 and 31,393.28 is: 47,092.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.44 : 117,216.08 = 31,393.28 : x
  2. Step 2: Convert to fraction form
    78,140.44/117,216.08 = 31,393.28/x
  3. Step 3: Cross multiply
    78,140.44x = 117,216.08 × 31,393.28
  4. Step 4: Simplify right side
    78,140.44x = 3,679,797,219.94
  5. Step 5: Solve for x
    x = 3,679,797,219.94/78,140.44
  6. Step 6: Final answer
    x = 47,092.10

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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.