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Finding the Fourth Proportional to 85,513.92, 128,273.76 and 23,185.92

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Solution

The fourth proportional to 85,513.92, 128,273.76 and 23,185.92 is: 34,779.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,513.92 : 128,273.76 = 23,185.92 : x
  2. Step 2: Convert to fraction form
    85,513.92/128,273.76 = 23,185.92/x
  3. Step 3: Cross multiply
    85,513.92x = 128,273.76 × 23,185.92
  4. Step 4: Simplify right side
    85,513.92x = 2,974,145,137.46
  5. Step 5: Solve for x
    x = 2,974,145,137.46/85,513.92
  6. Step 6: Final answer
    x = 34,779.66

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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.