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Finding the Fourth Proportional to 163,664.80, 245,266.80 and 121,213.60

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Solution

The fourth proportional to 163,664.80, 245,266.80 and 121,213.60 is: 181,649.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,664.80 : 245,266.80 = 121,213.60 : x
  2. Step 2: Convert to fraction form
    163,664.80/245,266.80 = 121,213.60/x
  3. Step 3: Cross multiply
    163,664.80x = 245,266.80 × 121,213.60
  4. Step 4: Simplify right side
    163,664.80x = 29,729,671,788.48
  5. Step 5: Solve for x
    x = 29,729,671,788.48/163,664.80
  6. Step 6: Final answer
    x = 181,649.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.