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Finding the Fourth Proportional to 84,890.72, 127,292.34 and 38,103.50

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Solution

The fourth proportional to 84,890.72, 127,292.34 and 38,103.50 is: 57,135.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,890.72 : 127,292.34 = 38,103.50 : x
  2. Step 2: Convert to fraction form
    84,890.72/127,292.34 = 38,103.50/x
  3. Step 3: Cross multiply
    84,890.72x = 127,292.34 × 38,103.50
  4. Step 4: Simplify right side
    84,890.72x = 4,850,283,677.19
  5. Step 5: Solve for x
    x = 4,850,283,677.19/84,890.72
  6. Step 6: Final answer
    x = 57,135.62

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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.