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Finding the Fourth Proportional to 73,821.75, 101,879.46 and 42,000.90

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Solution

The fourth proportional to 73,821.75, 101,879.46 and 42,000.90 is: 57,964.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,821.75 : 101,879.46 = 42,000.90 : x
  2. Step 2: Convert to fraction form
    73,821.75/101,879.46 = 42,000.90/x
  3. Step 3: Cross multiply
    73,821.75x = 101,879.46 × 42,000.90
  4. Step 4: Simplify right side
    73,821.75x = 4,279,029,011.51
  5. Step 5: Solve for x
    x = 4,279,029,011.51/73,821.75
  6. Step 6: Final answer
    x = 57,964.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.