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Finding the Fourth Proportional to 73,221.80, 109,832.70 and 72,703.40

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Solution

The fourth proportional to 73,221.80, 109,832.70 and 72,703.40 is: 109,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,221.80 : 109,832.70 = 72,703.40 : x
  2. Step 2: Convert to fraction form
    73,221.80/109,832.70 = 72,703.40/x
  3. Step 3: Cross multiply
    73,221.80x = 109,832.70 × 72,703.40
  4. Step 4: Simplify right side
    73,221.80x = 7,985,210,721.18
  5. Step 5: Solve for x
    x = 7,985,210,721.18/73,221.80
  6. Step 6: Final answer
    x = 109,055.10

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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.