Home / 78,421.45-117,631.94-22,261.61

Finding the Fourth Proportional to 78,421.45, 117,631.94 and 22,261.61

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Solution

The fourth proportional to 78,421.45, 117,631.94 and 22,261.61 is: 33,392.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,421.45 : 117,631.94 = 22,261.61 : x
  2. Step 2: Convert to fraction form
    78,421.45/117,631.94 = 22,261.61/x
  3. Step 3: Cross multiply
    78,421.45x = 117,631.94 × 22,261.61
  4. Step 4: Simplify right side
    78,421.45x = 2,618,675,955.53
  5. Step 5: Solve for x
    x = 2,618,675,955.53/78,421.45
  6. Step 6: Final answer
    x = 33,392.34

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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.