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Finding the Fourth Proportional to 89,900.74, 124,109.65 and 65,674.49

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Solution

The fourth proportional to 89,900.74, 124,109.65 and 65,674.49 is: 90,664.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,900.74 : 124,109.65 = 65,674.49 : x
  2. Step 2: Convert to fraction form
    89,900.74/124,109.65 = 65,674.49/x
  3. Step 3: Cross multiply
    89,900.74x = 124,109.65 × 65,674.49
  4. Step 4: Simplify right side
    89,900.74x = 8,150,838,113.92
  5. Step 5: Solve for x
    x = 8,150,838,113.92/89,900.74
  6. Step 6: Final answer
    x = 90,664.86

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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.