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Finding the Fourth Proportional to 157,621.20, 236,431.80 and 64,078.80

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Solution

The fourth proportional to 157,621.20, 236,431.80 and 64,078.80 is: 96,118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,621.20 : 236,431.80 = 64,078.80 : x
  2. Step 2: Convert to fraction form
    157,621.20/236,431.80 = 64,078.80/x
  3. Step 3: Cross multiply
    157,621.20x = 236,431.80 × 64,078.80
  4. Step 4: Simplify right side
    157,621.20x = 15,150,266,025.84
  5. Step 5: Solve for x
    x = 15,150,266,025.84/157,621.20
  6. Step 6: Final answer
    x = 96,118.20

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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.