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Finding the Fourth Proportional to 163,580.61, 225,724.02 and 90,971.75

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Solution

The fourth proportional to 163,580.61, 225,724.02 and 90,971.75 is: 125,531.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,580.61 : 225,724.02 = 90,971.75 : x
  2. Step 2: Convert to fraction form
    163,580.61/225,724.02 = 90,971.75/x
  3. Step 3: Cross multiply
    163,580.61x = 225,724.02 × 90,971.75
  4. Step 4: Simplify right side
    163,580.61x = 20,534,507,987.81
  5. Step 5: Solve for x
    x = 20,534,507,987.81/163,580.61
  6. Step 6: Final answer
    x = 125,531.43

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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.