Home / 78,747.42-117,989.65-55,331.94

Finding the Fourth Proportional to 78,747.42, 117,989.65 and 55,331.94

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Solution

The fourth proportional to 78,747.42, 117,989.65 and 55,331.94 is: 82,905.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,747.42 : 117,989.65 = 55,331.94 : x
  2. Step 2: Convert to fraction form
    78,747.42/117,989.65 = 55,331.94/x
  3. Step 3: Cross multiply
    78,747.42x = 117,989.65 × 55,331.94
  4. Step 4: Simplify right side
    78,747.42x = 6,528,596,434.80
  5. Step 5: Solve for x
    x = 6,528,596,434.80/78,747.42
  6. Step 6: Final answer
    x = 82,905.52

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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.