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Finding the Fourth Proportional to 68,755.50, 103,133.25 and 19,507.50

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Solution

The fourth proportional to 68,755.50, 103,133.25 and 19,507.50 is: 29,261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,755.50 : 103,133.25 = 19,507.50 : x
  2. Step 2: Convert to fraction form
    68,755.50/103,133.25 = 19,507.50/x
  3. Step 3: Cross multiply
    68,755.50x = 103,133.25 × 19,507.50
  4. Step 4: Simplify right side
    68,755.50x = 2,011,871,874.38
  5. Step 5: Solve for x
    x = 2,011,871,874.38/68,755.50
  6. Step 6: Final answer
    x = 29,261.25

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1.5x scale

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.