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Finding the Fourth Proportional to 121,996.80, 182,995.20 and 109,312.20

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Solution

The fourth proportional to 121,996.80, 182,995.20 and 109,312.20 is: 163,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,996.80 : 182,995.20 = 109,312.20 : x
  2. Step 2: Convert to fraction form
    121,996.80/182,995.20 = 109,312.20/x
  3. Step 3: Cross multiply
    121,996.80x = 182,995.20 × 109,312.20
  4. Step 4: Simplify right side
    121,996.80x = 20,003,607,901.44
  5. Step 5: Solve for x
    x = 20,003,607,901.44/121,996.80
  6. Step 6: Final answer
    x = 163,968.30

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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.