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Finding the Fourth Proportional to 89,871.53, 134,678.84 and 65,991.71

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Solution

The fourth proportional to 89,871.53, 134,678.84 and 65,991.71 is: 98,893.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,871.53 : 134,678.84 = 65,991.71 : x
  2. Step 2: Convert to fraction form
    89,871.53/134,678.84 = 65,991.71/x
  3. Step 3: Cross multiply
    89,871.53x = 134,678.84 × 65,991.71
  4. Step 4: Simplify right side
    89,871.53x = 8,887,686,622.46
  5. Step 5: Solve for x
    x = 8,887,686,622.46/89,871.53
  6. Step 6: Final answer
    x = 98,893.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.