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Finding the Fourth Proportional to 149,656.20, 206,560.90 and 86,030.90

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Solution

The fourth proportional to 149,656.20, 206,560.90 and 86,030.90 is: 118,742.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,656.20 : 206,560.90 = 86,030.90 : x
  2. Step 2: Convert to fraction form
    149,656.20/206,560.90 = 86,030.90/x
  3. Step 3: Cross multiply
    149,656.20x = 206,560.90 × 86,030.90
  4. Step 4: Simplify right side
    149,656.20x = 17,770,620,131.81
  5. Step 5: Solve for x
    x = 17,770,620,131.81/149,656.20
  6. Step 6: Final answer
    x = 118,742.96

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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.