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Finding the Fourth Proportional to 131,969.60, 197,662.80 and 69,567.20

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Solution

The fourth proportional to 131,969.60, 197,662.80 and 69,567.20 is: 104,197.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,969.60 : 197,662.80 = 69,567.20 : x
  2. Step 2: Convert to fraction form
    131,969.60/197,662.80 = 69,567.20/x
  3. Step 3: Cross multiply
    131,969.60x = 197,662.80 × 69,567.20
  4. Step 4: Simplify right side
    131,969.60x = 13,750,847,540.16
  5. Step 5: Solve for x
    x = 13,750,847,540.16/131,969.60
  6. Step 6: Final answer
    x = 104,197.08

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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.