Home / 71,129.16-106,693.82-18,538.60

Finding the Fourth Proportional to 71,129.16, 106,693.82 and 18,538.60

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Solution

The fourth proportional to 71,129.16, 106,693.82 and 18,538.60 is: 27,807.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,129.16 : 106,693.82 = 18,538.60 : x
  2. Step 2: Convert to fraction form
    71,129.16/106,693.82 = 18,538.60/x
  3. Step 3: Cross multiply
    71,129.16x = 106,693.82 × 18,538.60
  4. Step 4: Simplify right side
    71,129.16x = 1,977,954,051.45
  5. Step 5: Solve for x
    x = 1,977,954,051.45/71,129.16
  6. Step 6: Final answer
    x = 27,807.92

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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.