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Finding the Fourth Proportional to 87,448.80, 120,615.42 and 57,185.58

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Solution

The fourth proportional to 87,448.80, 120,615.42 and 57,185.58 is: 78,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,448.80 : 120,615.42 = 57,185.58 : x
  2. Step 2: Convert to fraction form
    87,448.80/120,615.42 = 57,185.58/x
  3. Step 3: Cross multiply
    87,448.80x = 120,615.42 × 57,185.58
  4. Step 4: Simplify right side
    87,448.80x = 6,897,462,749.64
  5. Step 5: Solve for x
    x = 6,897,462,749.64/87,448.80
  6. Step 6: Final answer
    x = 78,874.30

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1.5x scale

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.