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Finding the Fourth Proportional to 108,057.60, 161,989.20 and 68,594.40

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Solution

The fourth proportional to 108,057.60, 161,989.20 and 68,594.40 is: 102,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,057.60 : 161,989.20 = 68,594.40 : x
  2. Step 2: Convert to fraction form
    108,057.60/161,989.20 = 68,594.40/x
  3. Step 3: Cross multiply
    108,057.60x = 161,989.20 × 68,594.40
  4. Step 4: Simplify right side
    108,057.60x = 11,111,551,980.48
  5. Step 5: Solve for x
    x = 11,111,551,980.48/108,057.60
  6. Step 6: Final answer
    x = 102,829.90

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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.