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Finding the Fourth Proportional to 72,770.40, 109,153.44 and 56,233.44

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Solution

The fourth proportional to 72,770.40, 109,153.44 and 56,233.44 is: 84,348.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,770.40 : 109,153.44 = 56,233.44 : x
  2. Step 2: Convert to fraction form
    72,770.40/109,153.44 = 56,233.44/x
  3. Step 3: Cross multiply
    72,770.40x = 109,153.44 × 56,233.44
  4. Step 4: Simplify right side
    72,770.40x = 6,138,073,419.03
  5. Step 5: Solve for x
    x = 6,138,073,419.03/72,770.40
  6. Step 6: Final answer
    x = 84,348.49

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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.