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Finding the Fourth Proportional to 161,978.45, 223,536.35 and 90,372.31

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Solution

The fourth proportional to 161,978.45, 223,536.35 and 90,372.31 is: 124,717.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,978.45 : 223,536.35 = 90,372.31 : x
  2. Step 2: Convert to fraction form
    161,978.45/223,536.35 = 90,372.31/x
  3. Step 3: Cross multiply
    161,978.45x = 223,536.35 × 90,372.31
  4. Step 4: Simplify right side
    161,978.45x = 20,201,495,350.13
  5. Step 5: Solve for x
    x = 20,201,495,350.13/161,978.45
  6. Step 6: Final answer
    x = 124,717.18

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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.