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Finding the Fourth Proportional to 131,485.70, 197,403.53 and 69,199.94

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Solution

The fourth proportional to 131,485.70, 197,403.53 and 69,199.94 is: 103,892.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,485.70 : 197,403.53 = 69,199.94 : x
  2. Step 2: Convert to fraction form
    131,485.70/197,403.53 = 69,199.94/x
  3. Step 3: Cross multiply
    131,485.70x = 197,403.53 × 69,199.94
  4. Step 4: Simplify right side
    131,485.70x = 13,660,312,579.30
  5. Step 5: Solve for x
    x = 13,660,312,579.30/131,485.70
  6. Step 6: Final answer
    x = 103,892.00

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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.