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Finding the Fourth Proportional to 103,797.72, 155,127.84 and 75,776.78

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Solution

The fourth proportional to 103,797.72, 155,127.84 and 75,776.78 is: 113,249.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,797.72 : 155,127.84 = 75,776.78 : x
  2. Step 2: Convert to fraction form
    103,797.72/155,127.84 = 75,776.78/x
  3. Step 3: Cross multiply
    103,797.72x = 155,127.84 × 75,776.78
  4. Step 4: Simplify right side
    103,797.72x = 11,755,088,307.21
  5. Step 5: Solve for x
    x = 11,755,088,307.21/103,797.72
  6. Step 6: Final answer
    x = 113,249.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.