Home / 78,500.28-117,749.40-19,336.47

Finding the Fourth Proportional to 78,500.28, 117,749.40 and 19,336.47

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Solution

The fourth proportional to 78,500.28, 117,749.40 and 19,336.47 is: 29,004.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500.28 : 117,749.40 = 19,336.47 : x
  2. Step 2: Convert to fraction form
    78,500.28/117,749.40 = 19,336.47/x
  3. Step 3: Cross multiply
    78,500.28x = 117,749.40 × 19,336.47
  4. Step 4: Simplify right side
    78,500.28x = 2,276,857,740.62
  5. Step 5: Solve for x
    x = 2,276,857,740.62/78,500.28
  6. Step 6: Final answer
    x = 29,004.45

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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.