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Finding the Fourth Proportional to 223,513.92, 308,442.47 and 121,539.60

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Solution

The fourth proportional to 223,513.92, 308,442.47 and 121,539.60 is: 167,720.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,513.92 : 308,442.47 = 121,539.60 : x
  2. Step 2: Convert to fraction form
    223,513.92/308,442.47 = 121,539.60/x
  3. Step 3: Cross multiply
    223,513.92x = 308,442.47 × 121,539.60
  4. Step 4: Simplify right side
    223,513.92x = 37,487,973,819.11
  5. Step 5: Solve for x
    x = 37,487,973,819.11/223,513.92
  6. Step 6: Final answer
    x = 167,720.98

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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.