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Finding the Fourth Proportional to 121,505.60, 182,258.40 and 76,890.80

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Solution

The fourth proportional to 121,505.60, 182,258.40 and 76,890.80 is: 115,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,505.60 : 182,258.40 = 76,890.80 : x
  2. Step 2: Convert to fraction form
    121,505.60/182,258.40 = 76,890.80/x
  3. Step 3: Cross multiply
    121,505.60x = 182,258.40 × 76,890.80
  4. Step 4: Simplify right side
    121,505.60x = 14,013,994,182.72
  5. Step 5: Solve for x
    x = 14,013,994,182.72/121,505.60
  6. Step 6: Final answer
    x = 115,336.20

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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.