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Finding the Fourth Proportional to 85,974.96, 128,970.48 and 29,806.32

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Solution

The fourth proportional to 85,974.96, 128,970.48 and 29,806.32 is: 44,712.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,974.96 : 128,970.48 = 29,806.32 : x
  2. Step 2: Convert to fraction form
    85,974.96/128,970.48 = 29,806.32/x
  3. Step 3: Cross multiply
    85,974.96x = 128,970.48 × 29,806.32
  4. Step 4: Simplify right side
    85,974.96x = 3,844,135,397.43
  5. Step 5: Solve for x
    x = 3,844,135,397.43/85,974.96
  6. Step 6: Final answer
    x = 44,712.27

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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.