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Finding the Fourth Proportional to 85,563.95, 128,360.90 and 29,409.89

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Solution

The fourth proportional to 85,563.95, 128,360.90 and 29,409.89 is: 44,119.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,563.95 : 128,360.90 = 29,409.89 : x
  2. Step 2: Convert to fraction form
    85,563.95/128,360.90 = 29,409.89/x
  3. Step 3: Cross multiply
    85,563.95x = 128,360.90 × 29,409.89
  4. Step 4: Simplify right side
    85,563.95x = 3,775,079,381.02
  5. Step 5: Solve for x
    x = 3,775,079,381.02/85,563.95
  6. Step 6: Final answer
    x = 44,119.98

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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.