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Finding the Fourth Proportional to 85,717.26, 128,526.63 and 45,686.94

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Solution

The fourth proportional to 85,717.26, 128,526.63 and 45,686.94 is: 68,504.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,717.26 : 128,526.63 = 45,686.94 : x
  2. Step 2: Convert to fraction form
    85,717.26/128,526.63 = 45,686.94/x
  3. Step 3: Cross multiply
    85,717.26x = 128,526.63 × 45,686.94
  4. Step 4: Simplify right side
    85,717.26x = 5,871,988,433.21
  5. Step 5: Solve for x
    x = 5,871,988,433.21/85,717.26
  6. Step 6: Final answer
    x = 68,504.15

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.