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Finding the Fourth Proportional to 151,308.81, 208,796.54 and 90,882

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Solution

The fourth proportional to 151,308.81, 208,796.54 and 90,882 is: 125,411.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,308.81 : 208,796.54 = 90,882 : x
  2. Step 2: Convert to fraction form
    151,308.81/208,796.54 = 90,882/x
  3. Step 3: Cross multiply
    151,308.81x = 208,796.54 × 90,882
  4. Step 4: Simplify right side
    151,308.81x = 18,975,846,693.87
  5. Step 5: Solve for x
    x = 18,975,846,693.87/151,308.81
  6. Step 6: Final answer
    x = 125,411.38

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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.