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Finding the Fourth Proportional to 99,647.76, 138,107.45 and 97,781.52

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Solution

The fourth proportional to 99,647.76, 138,107.45 and 97,781.52 is: 135,520.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647.76 : 138,107.45 = 97,781.52 : x
  2. Step 2: Convert to fraction form
    99,647.76/138,107.45 = 97,781.52/x
  3. Step 3: Cross multiply
    99,647.76x = 138,107.45 × 97,781.52
  4. Step 4: Simplify right side
    99,647.76x = 13,504,355,895.42
  5. Step 5: Solve for x
    x = 13,504,355,895.42/99,647.76
  6. Step 6: Final answer
    x = 135,520.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.