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Finding the Fourth Proportional to 99,697.86, 137,611.51 and 56,700.54

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Solution

The fourth proportional to 99,697.86, 137,611.51 and 56,700.54 is: 78,262.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,697.86 : 137,611.51 = 56,700.54 : x
  2. Step 2: Convert to fraction form
    99,697.86/137,611.51 = 56,700.54/x
  3. Step 3: Cross multiply
    99,697.86x = 137,611.51 × 56,700.54
  4. Step 4: Simplify right side
    99,697.86x = 7,802,646,785.46
  5. Step 5: Solve for x
    x = 7,802,646,785.46/99,697.86
  6. Step 6: Final answer
    x = 78,262.93

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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.