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Finding the Fourth Proportional to 85,073.69, 127,616.40 and 28,890.87

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Solution

The fourth proportional to 85,073.69, 127,616.40 and 28,890.87 is: 43,338.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,073.69 : 127,616.40 = 28,890.87 : x
  2. Step 2: Convert to fraction form
    85,073.69/127,616.40 = 28,890.87/x
  3. Step 3: Cross multiply
    85,073.69x = 127,616.40 × 28,890.87
  4. Step 4: Simplify right side
    85,073.69x = 3,686,948,822.27
  5. Step 5: Solve for x
    x = 3,686,948,822.27/85,073.69
  6. Step 6: Final answer
    x = 43,338.30

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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.