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Finding the Fourth Proportional to 186,878.10, 280,147.05 and 68,520.90

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Solution

The fourth proportional to 186,878.10, 280,147.05 and 68,520.90 is: 102,718.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,878.10 : 280,147.05 = 68,520.90 : x
  2. Step 2: Convert to fraction form
    186,878.10/280,147.05 = 68,520.90/x
  3. Step 3: Cross multiply
    186,878.10x = 280,147.05 × 68,520.90
  4. Step 4: Simplify right side
    186,878.10x = 19,195,927,998.35
  5. Step 5: Solve for x
    x = 19,195,927,998.35/186,878.10
  6. Step 6: Final answer
    x = 102,718.98

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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.