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Finding the Fourth Proportional to 104,728.88, 144,527.28 and 56,982.80

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Solution

The fourth proportional to 104,728.88, 144,527.28 and 56,982.80 is: 78,637.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,728.88 : 144,527.28 = 56,982.80 : x
  2. Step 2: Convert to fraction form
    104,728.88/144,527.28 = 56,982.80/x
  3. Step 3: Cross multiply
    104,728.88x = 144,527.28 × 56,982.80
  4. Step 4: Simplify right side
    104,728.88x = 8,235,569,090.78
  5. Step 5: Solve for x
    x = 8,235,569,090.78/104,728.88
  6. Step 6: Final answer
    x = 78,637.04

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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.