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Finding the Fourth Proportional to 85,635.56, 128,454.30 and 38,253.08

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Solution

The fourth proportional to 85,635.56, 128,454.30 and 38,253.08 is: 57,380.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,635.56 : 128,454.30 = 38,253.08 : x
  2. Step 2: Convert to fraction form
    85,635.56/128,454.30 = 38,253.08/x
  3. Step 3: Cross multiply
    85,635.56x = 128,454.30 × 38,253.08
  4. Step 4: Simplify right side
    85,635.56x = 4,913,772,614.24
  5. Step 5: Solve for x
    x = 4,913,772,614.24/85,635.56
  6. Step 6: Final answer
    x = 57,380.05

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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.