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Finding the Fourth Proportional to 73,219.80, 109,829.70 and 72,701.40

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Solution

The fourth proportional to 73,219.80, 109,829.70 and 72,701.40 is: 109,052.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,219.80 : 109,829.70 = 72,701.40 : x
  2. Step 2: Convert to fraction form
    73,219.80/109,829.70 = 72,701.40/x
  3. Step 3: Cross multiply
    73,219.80x = 109,829.70 × 72,701.40
  4. Step 4: Simplify right side
    73,219.80x = 7,984,772,951.58
  5. Step 5: Solve for x
    x = 7,984,772,951.58/73,219.80
  6. Step 6: Final answer
    x = 109,052.10

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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.