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Finding the Fourth Proportional to 143,929.80, 215,829.90 and 65,003.40

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Solution

The fourth proportional to 143,929.80, 215,829.90 and 65,003.40 is: 97,475.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,929.80 : 215,829.90 = 65,003.40 : x
  2. Step 2: Convert to fraction form
    143,929.80/215,829.90 = 65,003.40/x
  3. Step 3: Cross multiply
    143,929.80x = 215,829.90 × 65,003.40
  4. Step 4: Simplify right side
    143,929.80x = 14,029,677,321.66
  5. Step 5: Solve for x
    x = 14,029,677,321.66/143,929.80
  6. Step 6: Final answer
    x = 97,475.83

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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.