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Finding the Fourth Proportional to 143,360.90, 214,968.45 and 84,214.70

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Solution

The fourth proportional to 143,360.90, 214,968.45 and 84,214.70 is: 126,279.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,360.90 : 214,968.45 = 84,214.70 : x
  2. Step 2: Convert to fraction form
    143,360.90/214,968.45 = 84,214.70/x
  3. Step 3: Cross multiply
    143,360.90x = 214,968.45 × 84,214.70
  4. Step 4: Simplify right side
    143,360.90x = 18,103,503,526.22
  5. Step 5: Solve for x
    x = 18,103,503,526.22/143,360.90
  6. Step 6: Final answer
    x = 126,279.23

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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.