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Finding the Fourth Proportional to 85,675.81, 128,544.48 and 38,286.94

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Solution

The fourth proportional to 85,675.81, 128,544.48 and 38,286.94 is: 57,444.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,675.81 : 128,544.48 = 38,286.94 : x
  2. Step 2: Convert to fraction form
    85,675.81/128,544.48 = 38,286.94/x
  3. Step 3: Cross multiply
    85,675.81x = 128,544.48 × 38,286.94
  4. Step 4: Simplify right side
    85,675.81x = 4,921,574,793.09
  5. Step 5: Solve for x
    x = 4,921,574,793.09/85,675.81
  6. Step 6: Final answer
    x = 57,444.16

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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.