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Finding the Fourth Proportional to 121,288.40, 181,932.60 and 81,630.80

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Solution

The fourth proportional to 121,288.40, 181,932.60 and 81,630.80 is: 122,446.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,288.40 : 181,932.60 = 81,630.80 : x
  2. Step 2: Convert to fraction form
    121,288.40/181,932.60 = 81,630.80/x
  3. Step 3: Cross multiply
    121,288.40x = 181,932.60 × 81,630.80
  4. Step 4: Simplify right side
    121,288.40x = 14,851,303,684.08
  5. Step 5: Solve for x
    x = 14,851,303,684.08/121,288.40
  6. Step 6: Final answer
    x = 122,446.20

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1.5x scale

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.