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Finding the Fourth Proportional to 144,115.79, 198,871.76 and 80,457.69

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Solution

The fourth proportional to 144,115.79, 198,871.76 and 80,457.69 is: 111,027.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,115.79 : 198,871.76 = 80,457.69 : x
  2. Step 2: Convert to fraction form
    144,115.79/198,871.76 = 80,457.69/x
  3. Step 3: Cross multiply
    144,115.79x = 198,871.76 × 80,457.69
  4. Step 4: Simplify right side
    144,115.79x = 16,000,762,013.55
  5. Step 5: Solve for x
    x = 16,000,762,013.55/144,115.79
  6. Step 6: Final answer
    x = 111,027.13

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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.