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Finding the Fourth Proportional to 85,854.92, 128,757.72 and 29,680.34

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Solution

The fourth proportional to 85,854.92, 128,757.72 and 29,680.34 is: 44,511.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,854.92 : 128,757.72 = 29,680.34 : x
  2. Step 2: Convert to fraction form
    85,854.92/128,757.72 = 29,680.34/x
  3. Step 3: Cross multiply
    85,854.92x = 128,757.72 × 29,680.34
  4. Step 4: Simplify right side
    85,854.92x = 3,821,572,907.22
  5. Step 5: Solve for x
    x = 3,821,572,907.22/85,854.92
  6. Step 6: Final answer
    x = 44,511.98

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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.