Home / 78,240.64-117,365.28-31,487.44

Finding the Fourth Proportional to 78,240.64, 117,365.28 and 31,487.44

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Solution

The fourth proportional to 78,240.64, 117,365.28 and 31,487.44 is: 47,232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,240.64 : 117,365.28 = 31,487.44 : x
  2. Step 2: Convert to fraction form
    78,240.64/117,365.28 = 31,487.44/x
  3. Step 3: Cross multiply
    78,240.64x = 117,365.28 × 31,487.44
  4. Step 4: Simplify right side
    78,240.64x = 3,695,532,212.08
  5. Step 5: Solve for x
    x = 3,695,532,212.08/78,240.64
  6. Step 6: Final answer
    x = 47,232.90

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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.