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Finding the Fourth Proportional to 117,149.60, 161,638.80 and 66,864.80

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Solution

The fourth proportional to 117,149.60, 161,638.80 and 66,864.80 is: 92,257.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,149.60 : 161,638.80 = 66,864.80 : x
  2. Step 2: Convert to fraction form
    117,149.60/161,638.80 = 66,864.80/x
  3. Step 3: Cross multiply
    117,149.60x = 161,638.80 × 66,864.80
  4. Step 4: Simplify right side
    117,149.60x = 10,807,946,034.24
  5. Step 5: Solve for x
    x = 10,807,946,034.24/117,149.60
  6. Step 6: Final answer
    x = 92,257.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.