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Finding the Fourth Proportional to 128,934.30, 193,401.45 and 73,638.30

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Solution

The fourth proportional to 128,934.30, 193,401.45 and 73,638.30 is: 110,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.30 : 193,401.45 = 73,638.30 : x
  2. Step 2: Convert to fraction form
    128,934.30/193,401.45 = 73,638.30/x
  3. Step 3: Cross multiply
    128,934.30x = 193,401.45 × 73,638.30
  4. Step 4: Simplify right side
    128,934.30x = 14,241,753,995.54
  5. Step 5: Solve for x
    x = 14,241,753,995.54/128,934.30
  6. Step 6: Final answer
    x = 110,457.45

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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.