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Finding the Fourth Proportional to 103,884.88, 143,361.18 and 56,138.23

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Solution

The fourth proportional to 103,884.88, 143,361.18 and 56,138.23 is: 77,470.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,884.88 : 143,361.18 = 56,138.23 : x
  2. Step 2: Convert to fraction form
    103,884.88/143,361.18 = 56,138.23/x
  3. Step 3: Cross multiply
    103,884.88x = 143,361.18 × 56,138.23
  4. Step 4: Simplify right side
    103,884.88x = 8,048,042,895.91
  5. Step 5: Solve for x
    x = 8,048,042,895.91/103,884.88
  6. Step 6: Final answer
    x = 77,470.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.