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Finding the Fourth Proportional to 85,621.62, 128,400.48 and 29,445.82

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Solution

The fourth proportional to 85,621.62, 128,400.48 and 29,445.82 is: 44,157.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,621.62 : 128,400.48 = 29,445.82 : x
  2. Step 2: Convert to fraction form
    85,621.62/128,400.48 = 29,445.82/x
  3. Step 3: Cross multiply
    85,621.62x = 128,400.48 × 29,445.82
  4. Step 4: Simplify right side
    85,621.62x = 3,780,857,421.99
  5. Step 5: Solve for x
    x = 3,780,857,421.99/85,621.62
  6. Step 6: Final answer
    x = 44,157.74

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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.