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Finding the Fourth Proportional to 72,801.21, 100,450.16 and 42,580.62

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Solution

The fourth proportional to 72,801.21, 100,450.16 and 42,580.62 is: 58,752.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,801.21 : 100,450.16 = 42,580.62 : x
  2. Step 2: Convert to fraction form
    72,801.21/100,450.16 = 42,580.62/x
  3. Step 3: Cross multiply
    72,801.21x = 100,450.16 × 42,580.62
  4. Step 4: Simplify right side
    72,801.21x = 4,277,229,879.00
  5. Step 5: Solve for x
    x = 4,277,229,879.00/72,801.21
  6. Step 6: Final answer
    x = 58,752.18

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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.