Home / 78,175.60-117,263.43-31,428.47

Finding the Fourth Proportional to 78,175.60, 117,263.43 and 31,428.47

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Solution

The fourth proportional to 78,175.60, 117,263.43 and 31,428.47 is: 47,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,175.60 : 117,263.43 = 31,428.47 : x
  2. Step 2: Convert to fraction form
    78,175.60/117,263.43 = 31,428.47/x
  3. Step 3: Cross multiply
    78,175.60x = 117,263.43 × 31,428.47
  4. Step 4: Simplify right side
    78,175.60x = 3,685,410,485.01
  5. Step 5: Solve for x
    x = 3,685,410,485.01/78,175.60
  6. Step 6: Final answer
    x = 47,142.72

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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.