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Finding the Fourth Proportional to 113,857.60, 170,786.40 and 87,613.60

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Solution

The fourth proportional to 113,857.60, 170,786.40 and 87,613.60 is: 131,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,857.60 : 170,786.40 = 87,613.60 : x
  2. Step 2: Convert to fraction form
    113,857.60/170,786.40 = 87,613.60/x
  3. Step 3: Cross multiply
    113,857.60x = 170,786.40 × 87,613.60
  4. Step 4: Simplify right side
    113,857.60x = 14,963,211,335.04
  5. Step 5: Solve for x
    x = 14,963,211,335.04/113,857.60
  6. Step 6: Final answer
    x = 131,420.40

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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.