Home / 78,033.21-117,053.15-30,658.56

Finding the Fourth Proportional to 78,033.21, 117,053.15 and 30,658.56

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Solution

The fourth proportional to 78,033.21, 117,053.15 and 30,658.56 is: 45,989.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,033.21 : 117,053.15 = 30,658.56 : x
  2. Step 2: Convert to fraction form
    78,033.21/117,053.15 = 30,658.56/x
  3. Step 3: Cross multiply
    78,033.21x = 117,053.15 × 30,658.56
  4. Step 4: Simplify right side
    78,033.21x = 3,588,681,022.46
  5. Step 5: Solve for x
    x = 3,588,681,022.46/78,033.21
  6. Step 6: Final answer
    x = 45,989.15

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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.