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Finding the Fourth Proportional to 85,991.81, 118,669.78 and 47,753.74

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Solution

The fourth proportional to 85,991.81, 118,669.78 and 47,753.74 is: 65,900.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,991.81 : 118,669.78 = 47,753.74 : x
  2. Step 2: Convert to fraction form
    85,991.81/118,669.78 = 47,753.74/x
  3. Step 3: Cross multiply
    85,991.81x = 118,669.78 × 47,753.74
  4. Step 4: Simplify right side
    85,991.81x = 5,666,926,219.82
  5. Step 5: Solve for x
    x = 5,666,926,219.82/85,991.81
  6. Step 6: Final answer
    x = 65,900.76

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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.