Home / 78,533.20-117,799.80-47,429.20

Finding the Fourth Proportional to 78,533.20, 117,799.80 and 47,429.20

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Solution

The fourth proportional to 78,533.20, 117,799.80 and 47,429.20 is: 71,143.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,533.20 : 117,799.80 = 47,429.20 : x
  2. Step 2: Convert to fraction form
    78,533.20/117,799.80 = 47,429.20/x
  3. Step 3: Cross multiply
    78,533.20x = 117,799.80 × 47,429.20
  4. Step 4: Simplify right side
    78,533.20x = 5,587,150,274.16
  5. Step 5: Solve for x
    x = 5,587,150,274.16/78,533.20
  6. Step 6: Final answer
    x = 71,143.80

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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.