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Finding the Fourth Proportional to 178,989.84, 247,006.90 and 98,422.58

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Solution

The fourth proportional to 178,989.84, 247,006.90 and 98,422.58 is: 135,823.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,989.84 : 247,006.90 = 98,422.58 : x
  2. Step 2: Convert to fraction form
    178,989.84/247,006.90 = 98,422.58/x
  3. Step 3: Cross multiply
    178,989.84x = 247,006.90 × 98,422.58
  4. Step 4: Simplify right side
    178,989.84x = 24,311,056,375.80
  5. Step 5: Solve for x
    x = 24,311,056,375.80/178,989.84
  6. Step 6: Final answer
    x = 135,823.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.