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Finding the Fourth Proportional to 64,121.60, 96,182.40 and 42,003.20

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Solution

The fourth proportional to 64,121.60, 96,182.40 and 42,003.20 is: 63,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,121.60 : 96,182.40 = 42,003.20 : x
  2. Step 2: Convert to fraction form
    64,121.60/96,182.40 = 42,003.20/x
  3. Step 3: Cross multiply
    64,121.60x = 96,182.40 × 42,003.20
  4. Step 4: Simplify right side
    64,121.60x = 4,039,968,583.68
  5. Step 5: Solve for x
    x = 4,039,968,583.68/64,121.60
  6. Step 6: Final answer
    x = 63,004.80

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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.