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Finding the Fourth Proportional to 72,230.66, 99,470.40 and 59,538.77

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Solution

The fourth proportional to 72,230.66, 99,470.40 and 59,538.77 is: 81,992.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,230.66 : 99,470.40 = 59,538.77 : x
  2. Step 2: Convert to fraction form
    72,230.66/99,470.40 = 59,538.77/x
  3. Step 3: Cross multiply
    72,230.66x = 99,470.40 × 59,538.77
  4. Step 4: Simplify right side
    72,230.66x = 5,922,345,267.41
  5. Step 5: Solve for x
    x = 5,922,345,267.41/72,230.66
  6. Step 6: Final answer
    x = 81,992.12

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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.