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Finding the Fourth Proportional to 161,391, 222,719.58 and 90,735

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Solution

The fourth proportional to 161,391, 222,719.58 and 90,735 is: 125,214.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,391 : 222,719.58 = 90,735 : x
  2. Step 2: Convert to fraction form
    161,391/222,719.58 = 90,735/x
  3. Step 3: Cross multiply
    161,391x = 222,719.58 × 90,735
  4. Step 4: Simplify right side
    161,391x = 20,208,461,091.30
  5. Step 5: Solve for x
    x = 20,208,461,091.30/161,391
  6. Step 6: Final answer
    x = 125,214.30

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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.