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Finding the Fourth Proportional to 131,505.90, 197,356.05 and 87,117.90

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Solution

The fourth proportional to 131,505.90, 197,356.05 and 87,117.90 is: 130,741.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,505.90 : 197,356.05 = 87,117.90 : x
  2. Step 2: Convert to fraction form
    131,505.90/197,356.05 = 87,117.90/x
  3. Step 3: Cross multiply
    131,505.90x = 197,356.05 × 87,117.90
  4. Step 4: Simplify right side
    131,505.90x = 17,193,244,628.30
  5. Step 5: Solve for x
    x = 17,193,244,628.30/131,505.90
  6. Step 6: Final answer
    x = 130,741.24

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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.