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Finding the Fourth Proportional to 40,752.40, 61,128.60 and 40,493.20

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Solution

The fourth proportional to 40,752.40, 61,128.60 and 40,493.20 is: 60,739.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,752.40 : 61,128.60 = 40,493.20 : x
  2. Step 2: Convert to fraction form
    40,752.40/61,128.60 = 40,493.20/x
  3. Step 3: Cross multiply
    40,752.40x = 61,128.60 × 40,493.20
  4. Step 4: Simplify right side
    40,752.40x = 2,475,292,625.52
  5. Step 5: Solve for x
    x = 2,475,292,625.52/40,752.40
  6. Step 6: Final answer
    x = 60,739.80

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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.