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Finding the Fourth Proportional to 89,871.08, 134,678.16 and 65,991.26

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Solution

The fourth proportional to 89,871.08, 134,678.16 and 65,991.26 is: 98,892.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,871.08 : 134,678.16 = 65,991.26 : x
  2. Step 2: Convert to fraction form
    89,871.08/134,678.16 = 65,991.26/x
  3. Step 3: Cross multiply
    89,871.08x = 134,678.16 × 65,991.26
  4. Step 4: Simplify right side
    89,871.08x = 8,887,581,809.58
  5. Step 5: Solve for x
    x = 8,887,581,809.58/89,871.08
  6. Step 6: Final answer
    x = 98,892.57

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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.