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Finding the Fourth Proportional to 100,934.30, 151,401.45 and 72,940.70

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Solution

The fourth proportional to 100,934.30, 151,401.45 and 72,940.70 is: 109,411.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,934.30 : 151,401.45 = 72,940.70 : x
  2. Step 2: Convert to fraction form
    100,934.30/151,401.45 = 72,940.70/x
  3. Step 3: Cross multiply
    100,934.30x = 151,401.45 × 72,940.70
  4. Step 4: Simplify right side
    100,934.30x = 11,043,327,744.02
  5. Step 5: Solve for x
    x = 11,043,327,744.02/100,934.30
  6. Step 6: Final answer
    x = 109,411.05

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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.