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Finding the Fourth Proportional to 221,777.40, 306,052.80 and 121,175.40

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Solution

The fourth proportional to 221,777.40, 306,052.80 and 121,175.40 is: 167,222.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,777.40 : 306,052.80 = 121,175.40 : x
  2. Step 2: Convert to fraction form
    221,777.40/306,052.80 = 121,175.40/x
  3. Step 3: Cross multiply
    221,777.40x = 306,052.80 × 121,175.40
  4. Step 4: Simplify right side
    221,777.40x = 37,086,070,461.12
  5. Step 5: Solve for x
    x = 37,086,070,461.12/221,777.40
  6. Step 6: Final answer
    x = 167,222.05

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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.