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Finding the Fourth Proportional to 118,087.94, 162,953.21 and 66,412.78

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Solution

The fourth proportional to 118,087.94, 162,953.21 and 66,412.78 is: 91,645.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,087.94 : 162,953.21 = 66,412.78 : x
  2. Step 2: Convert to fraction form
    118,087.94/162,953.21 = 66,412.78/x
  3. Step 3: Cross multiply
    118,087.94x = 162,953.21 × 66,412.78
  4. Step 4: Simplify right side
    118,087.94x = 10,822,174,539.19
  5. Step 5: Solve for x
    x = 10,822,174,539.19/118,087.94
  6. Step 6: Final answer
    x = 91,645.04

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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.