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Finding the Fourth Proportional to 85,449.94, 128,145.20 and 47,557.01

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Solution

The fourth proportional to 85,449.94, 128,145.20 and 47,557.01 is: 71,318.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,449.94 : 128,145.20 = 47,557.01 : x
  2. Step 2: Convert to fraction form
    85,449.94/128,145.20 = 47,557.01/x
  3. Step 3: Cross multiply
    85,449.94x = 128,145.20 × 47,557.01
  4. Step 4: Simplify right side
    85,449.94x = 6,094,202,640.43
  5. Step 5: Solve for x
    x = 6,094,202,640.43/85,449.94
  6. Step 6: Final answer
    x = 71,318.98

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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.