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Finding the Fourth Proportional to 85,333.81, 128,000.72 and 23,004.31

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Solution

The fourth proportional to 85,333.81, 128,000.72 and 23,004.31 is: 34,506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,333.81 : 128,000.72 = 23,004.31 : x
  2. Step 2: Convert to fraction form
    85,333.81/128,000.72 = 23,004.31/x
  3. Step 3: Cross multiply
    85,333.81x = 128,000.72 × 23,004.31
  4. Step 4: Simplify right side
    85,333.81x = 2,944,568,243.10
  5. Step 5: Solve for x
    x = 2,944,568,243.10/85,333.81
  6. Step 6: Final answer
    x = 34,506.47

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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.