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Finding the Fourth Proportional to 85,810.92, 128,679.90 and 39,093.48

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Solution

The fourth proportional to 85,810.92, 128,679.90 and 39,093.48 is: 58,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810.92 : 128,679.90 = 39,093.48 : x
  2. Step 2: Convert to fraction form
    85,810.92/128,679.90 = 39,093.48/x
  3. Step 3: Cross multiply
    85,810.92x = 128,679.90 × 39,093.48
  4. Step 4: Simplify right side
    85,810.92x = 5,030,545,097.05
  5. Step 5: Solve for x
    x = 5,030,545,097.05/85,810.92
  6. Step 6: Final answer
    x = 58,623.60

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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.