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Finding the Fourth Proportional to 103,805.69, 143,251.85 and 56,059.03

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Solution

The fourth proportional to 103,805.69, 143,251.85 and 56,059.03 is: 77,361.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,805.69 : 143,251.85 = 56,059.03 : x
  2. Step 2: Convert to fraction form
    103,805.69/143,251.85 = 56,059.03/x
  3. Step 3: Cross multiply
    103,805.69x = 143,251.85 × 56,059.03
  4. Step 4: Simplify right side
    103,805.69x = 8,030,559,476.41
  5. Step 5: Solve for x
    x = 8,030,559,476.41/103,805.69
  6. Step 6: Final answer
    x = 77,361.46

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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.