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Finding the Fourth Proportional to 157,785.60, 236,851.20 and 87,801.60

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Solution

The fourth proportional to 157,785.60, 236,851.20 and 87,801.60 is: 131,798.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,785.60 : 236,851.20 = 87,801.60 : x
  2. Step 2: Convert to fraction form
    157,785.60/236,851.20 = 87,801.60/x
  3. Step 3: Cross multiply
    157,785.60x = 236,851.20 × 87,801.60
  4. Step 4: Simplify right side
    157,785.60x = 20,795,914,321.92
  5. Step 5: Solve for x
    x = 20,795,914,321.92/157,785.60
  6. Step 6: Final answer
    x = 131,798.56

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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.