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Finding the Fourth Proportional to 163,261.80, 225,324.02 and 90,681

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Solution

The fourth proportional to 163,261.80, 225,324.02 and 90,681 is: 125,152.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,261.80 : 225,324.02 = 90,681 : x
  2. Step 2: Convert to fraction form
    163,261.80/225,324.02 = 90,681/x
  3. Step 3: Cross multiply
    163,261.80x = 225,324.02 × 90,681
  4. Step 4: Simplify right side
    163,261.80x = 20,432,607,457.62
  5. Step 5: Solve for x
    x = 20,432,607,457.62/163,261.80
  6. Step 6: Final answer
    x = 125,152.41

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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.