Home / 78,345.42-117,430.64-33,905.58

Finding the Fourth Proportional to 78,345.42, 117,430.64 and 33,905.58

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Solution

The fourth proportional to 78,345.42, 117,430.64 and 33,905.58 is: 50,820.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,345.42 : 117,430.64 = 33,905.58 : x
  2. Step 2: Convert to fraction form
    78,345.42/117,430.64 = 33,905.58/x
  3. Step 3: Cross multiply
    78,345.42x = 117,430.64 × 33,905.58
  4. Step 4: Simplify right side
    78,345.42x = 3,981,553,958.97
  5. Step 5: Solve for x
    x = 3,981,553,958.97/78,345.42
  6. Step 6: Final answer
    x = 50,820.51

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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.