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Finding the Fourth Proportional to 143,859.90, 215,820.98 and 55,113.40

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Solution

The fourth proportional to 143,859.90, 215,820.98 and 55,113.40 is: 82,682.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,859.90 : 215,820.98 = 55,113.40 : x
  2. Step 2: Convert to fraction form
    143,859.90/215,820.98 = 55,113.40/x
  3. Step 3: Cross multiply
    143,859.90x = 215,820.98 × 55,113.40
  4. Step 4: Simplify right side
    143,859.90x = 11,894,627,999.13
  5. Step 5: Solve for x
    x = 11,894,627,999.13/143,859.90
  6. Step 6: Final answer
    x = 82,682.03

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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.